BOSCH GCM18V-12SD 18V 12 In Slide Miter Saw User Manual

: June 9, 2024
: Bosch

Table of Contents

GCM18V-12SD 18V 12 In Slide Miter Saw
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

GCM18V-12SD 18V 12 In Slide Miter Saw

IMPORTANT

Read Before Using

IMPORTANT Lire avant usage

IMPORTANTE

Leer antes de usar

Operating / Safety Instructions Consignes d’utilisation / de sécurité Instrucciones de funcionamiento y seguridad

GCM18V-12SD

Call Toll Free for Consumer Information & Service Locations Pour obtenir des informations et les adresses de nos centres de service après-vente, appelez ce numéro gratuit
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For English Version

See page 2

Version française Voir page 57

Versión en español

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Safety Symbols

The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to these symbols.

This is the safety alert symbol. It is used to alert you to potential per-

sonal injury hazards. Obey all safety messages that follow this symbol

to avoid possible injury or death.

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

Table of Contents

Safety Symbols . . . . . . . . . . . . . . . . . . . . . . 2 General Power Tool Safety Warnings . . . . . 3 Safety Instructions for Miter Saws . . . . . . . 5 Additional Safety Rules. . . . . . . . . . . . . . . . 7 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Getting to Know Your Miter Saw. . . . . . . . 10 Specifications . . . . . . . . . . . . . . . . . . . . . . 14 Intended Use . . . . . . . . . . . . . . . . . . . . . . 14
Cutting Masonry/Metal . . . . . . . . . . . . 14 Cutting Capacities . . . . . . . . . . . . . . . . . . 15 Unpacking and Checking Contents . . . . . . 16
Unpacking the Miter Saw . . . . . . . . . . 16 Checking Contents in Package . . . . . . 16 Tools Needed For Assembly . . . . . . . . . . . 17 Verifying Parts. . . . . . . . . . . . . . . . . . . 17 Checking Combination Square . . . . . . 17 Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . 18 Storing the Torx Wrench . . . . . . . . . . . 18 Attaching the Base Extensions . . . . . . 18 Inserting and Releasing Battery
Pack. . . . . . . . . . . . . . . . . . . . . . . . 19 Removing and Installing Blades . . . . . 19

Assembling Dust Collection System. . . . . . . . . . . . . . . . . . . . . . 21
Adjustments . . . . . . . . . . . . . . . . . . . . . . . 22 Using the Head Assembly Lock Pin . . . 22 Miter Detent System Adjustment Procedure . . . . . . . . . . . . . . . . . . . 23 0° Bevel Stop . . . . . . . . . . . . . . . . . . . 24 45° Bevel Stop . . . . . . . . . . . . . . . . . . 25
Transporting and Mounting . . . . . . . . . . . 27 Lifting the Saw . . . . . . . . . . . . . . . . . . 27 Mounting Applications . . . . . . . . . . . . 28
Preparing for Saw Operations . . . . . . . . . 29 Switch Activation . . . . . . . . . . . . . . . . 29 Built-in LED Light . . . . . . . . . . . . . . . . 29 Body and Hand Position . . . . . . . . . . . 29 Workpiece Support . . . . . . . . . . . . . . . 32
Saw Operations . . . . . . . . . . . . . . . . . . . . 35 Brake Operation . . . . . . . . . . . . . . . . . 35 Chop/Crown Lock . . . . . . . . . . . . . . . . 35 Using the Miter Lock Knob . . . . . . . . . 36 Using Miter Detent System . . . . . . . . . 36 Miter Detent Override . . . . . . . . . . . . . 36 Chop Cuts . . . . . . . . . . . . . . . . . . . . . . 37

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Table of Contents

Slide Cuts . . . . . . . . . . . . . . . . . . . . . . 38 Miter Cuts . . . . . . . . . . . . . . . . . . . . . . 39 Bevel Cuts . . . . . . . . . . . . . . . . . . . . . . 41 2x@45 Stop. . . . . . . . . . . . . . . . . . . . . 42 Compound Cuts . . . . . . . . . . . . . . . . . 43 Cutting Base Molding . . . . . . . . . . . . . 44 Cutting Crown Molding . . . . . . . . . . . . 45 Special Cuts . . . . . . . . . . . . . . . . . . . . 51 Maintenance and Lubrication . . . . . . . . . . 53 Service . . . . . . . . . . . . . . . . . . . . . . . . 53

Batteries . . . . . . . . . . . . . . . . . . . . . . . 53 Care of Blades. . . . . . . . . . . . . . . . . . . 53 Tool Lubrication . . . . . . . . . . . . . . . . . 53 Bearings . . . . . . . . . . . . . . . . . . . . . . . 53 Cleaning . . . . . . . . . . . . . . . . . . . . . . . 53 Troubleshooting . . . . . . . . . . . . . . . . . . . . 54 Troubleshooting Guide – Electrical . . . 54 Troubleshooting Guide – General . . . . 55 Attachments and Accessories. . . . . . . . . . 56

General Power Tool Safety Warnings

Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE
The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

1. Work area safety
a. Keep work area clean and well lit. Cluttered or dark areas invite accidents.
b. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
c. Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
2. Electrical safety
a. Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
b. Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an

increased risk of electric shock if your body is earthed or grounded.
c. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
d. Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
e. When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
f. If operating a power tool in a damp location is unavoidable, use a Ground Fault Circuit Interrupter (GFCI) protected supply. Use of an GFCI reduces the risk of electric shock.

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General Power Tool Safety Warnings

3. Personal safety
a. Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
b. Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
c. Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and / or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents.
d. Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
e. Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
f. Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts.
g. If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
h. Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.

4. Power tool use and care
a. Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
b. Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
c. Disconnect the plug from the power source and/or remove the battery pack, if detachable, from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
d. Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
e. Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
f. Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
g. Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
h. Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.

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General Power Tool Safety Warnings

5. Battery tool use and care
a. Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.
b. Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
c. When battery pack is not in use, keep it away from other metal objects like paper clips, coins, keys, nails, screws, or other small metal objects that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fire.
d. Under abusive conditions, liquid may be ejected from the battery, avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
e. Do not use a battery pack or tool that is damaged or modified. Damaged or modified

batteries may exhibit unpredictable behaviour resulting in fire, explosion or risk of injury.
f. Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 265 °F may cause explosion.
g. Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specified in the instructions. Charging improperly or at temperatures outside the specified range may damage the battery and increase the risk of fire.
6. Service
a. Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
b. Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorized service providers.

Safety Instructions for Miter Saws

a. Miter saws are intended to cut wood or wood-like products, they cannot be used with abrasive cut-off wheels for cutting ferrous material such as bars, rods, studs, etc. Abrasive dust causes moving parts such as the lower guard to jam. Sparks from abrasive cutting will burn the lower guard, the kerf insert and other plastic parts.
b. Use clamps to support the workpiece whenever possible. If supporting the workpiece by hand, you must always keep your hand at least 100 mm (4″) from either side of the saw blade. Do not use this saw to cut pieces that are too small to be securely clamped or held by hand. If your hand is placed too close to the saw blade, there is an increased risk of injury from blade contact.
c. The workpiece must be stationary and clamped or held against both the fence

and the table. Do not feed the workpiece into the blade or cut “freehand” in any way. Unrestrained or moving workpieces could be thrown at high speeds, causing injury.
d. Push the saw through the workpiece. Do not pull the saw through the workpiece. To make a cut, raise the saw head and pull it out over the workpiece without cutting, start the motor, press the saw head down and push the saw through the workpiece. Cutting on the pull stroke is likely to cause the saw blade to climb on top of the workpiece and violently throw the blade assembly towards the operator.
e. Never cross your hand over the intended line of cutting either in front or behind the saw blade. Supporting the workpiece “cross handed” i.e. holding the workpiece to the

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Safety Instructions for Miter Saws

right of the saw blade with your left hand or vice versa is very dangerous.
f. Do not reach behind the fence with either hand closer than 100 mm (4″) from either side of the saw blade, to remove wood scraps, or for any other reason while the blade is spinning. The proximity of the spinning saw blade to your hand may not be obvious and you may be seriously injured.
g. Inspect your workpiece before cutting. If the workpiece is bowed or warped, clamp it with the outside bowed face toward the fence. Always make certain that there is no gap between the workpiece, fence and table along the line of the cut. Bent or warped workpieces can twist or shift and may cause binding on the spinning saw blade while cutting. There should be no nails or foreign objects in the workpiece.
h. Do not use the saw until the table is clear of all tools, wood scraps, etc., except for the workpiece. Small debris or loose pieces of wood or other objects that contact the revolving blade can be thrown with high speed.
i. Cut only one workpiece at a time. Stacked multiple workpieces cannot be adequately clamped or braced and may bind on the blade or shift during cutting.
j. Ensure the miter saw is mounted or placed on a level, firm work surface before use. A level and firm work surface reduces the risk of the miter saw becoming unstable.
k. Plan your work. Every time you change the bevel or miter angle setting, make sure the adjustable fence is set correctly to support the workpiece and will not interfere with the blade or the guarding system. Without turning the tool “ON” and with no workpiece on the table, move the saw blade through a complete simulated cut to assure there will be no interference or danger of cutting the fence.
l. Provide adequate support such as table extensions, saw horses, etc. for a workpiece that is wider or longer than the table top. Workpieces longer or wider than the miter saw table can tip if not securely supported. If the cut- off piece or workpiece tips, it can lift the lower guard or be thrown by the spinning blade.

m. Do not use another person as a substitute for a table extension or as additional support. Unstable support for the workpiece can cause the blade to bind or the workpiece to shift during the cutting operation pulling you and the helper into the spinning blade.
n. The cut-off piece must not be jammed or pressed by any means against the spinning saw blade. If confined, i.e. using length stops, the cut-off piece could get wedged against the blade and thrown violently.
o. Always use a clamp or a fixture designed to properly support round material such as rods or tubing. Rods have a tendency to roll while being cut, causing the blade to “bite” and pull the work with your hand into the blade.
p. Let the blade reach full speed before contacting the workpiece. This will reduce the risk of the workpiece being thrown.
q. If the workpiece or blade becomes jammed, turn the miter saw off. Wait for all moving parts to stop and disconnect the plug from the power source and/or remove the battery pack. Then work to free the jammed material. Continued sawing with a jammed workpiece could cause loss of control or damage to the miter saw.
r. After finishing the cut, release the switch, hold the saw head down and wait for the blade to stop before removing the cut-off piece. Reaching with your hand near the coasting blade is dangerous.
s. Hold the handle firmly when making an incomplete cut or when releasing the switch before the saw head is completely in the down position. The braking action of the saw may cause the saw head to be suddenly pulled downward, causing a risk of injury.
t. Avoid overheating the saw blade tips.

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Additional Safety Rules

GFCI and personal protection devices like electrician’s rubber gloves and footwear will further enhance your personal safety.
Do not use AC only rated tools with a DC power supply. While the tool may appear to work, the electrical components of the AC rated tool are likely to fail and create a hazard to the operator.
Keep handles dry, clean and free from oil and grease. Slippery hands cannot safely control the power tool.
Develop a periodic maintenance schedule for your tool. When cleaning a tool be careful not to disassemble any portion of the tool since internal wires may be misplaced or pinched or safety guard return springs may be improperly mounted. Certain cleaning agents such as gasoline, carbon tetrachloride, ammonia, etc. may damage plastic parts.
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:
· Lead from lead-based paints,
· Crystalline silica from bricks and cement and other masonry products, and
· Arsenic and chromium from chemicallytreated lumber.
Your risk from these exposures varies, depending on how often you do this type of work. To re-

duce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

Do not use the Bosch GCM18V-12SD miter saw to cut fiber cement board. Cutting materials containing crystalline silica may create exposures to respirable silica dust.

ter saw.

Before each use, review all warnings located on the mi-

WARNING The operation of any power
tool can result in foreign objects being thrown into the eyes, which can result in severe eye damage. Always Wear Eye Protection wear safety goggles that comply with ANSI Z87.1 (shown on package) before commencing power tool operation.

Do not use this miter saw without properly installed base extensions. Lack of appropriate workpiece support may result in personal injury.

DESIGNATED DANGER ZONES Avoid positioning hands, fingers or arms.

Do not carry the saw by this handle. Ne portez pas la scie par cette poignée. No transporte la sierra por este mango.
DESIGNATED NO-CARRY AREA A danger zone never lift or carry saw by
the main switch handle.

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Symbols

Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer.

Symbol V

Designation/Explanation Volts (voltage)

Amperes (current)

Hertz (frequency, cycles per second)

Watt (power)

Kilograms (weight)

min

Minutes (time)

Seconds (time)

CFM

n0 n

Cubic feet per minute [or ft3/min] (air flow rate) Diameter (size of drill bits, grinding wheels, etc.) No load speed (rotational speed, at no load) Rated speed (Maximum attainable speed)

…/min

Revolutions or reciprocation per minute (revolutions, strokes, surface speed, orbits etc. per minute)

Off position (zero speed, zero torque…)

1, 2, 3, … Selector settings (speed, torque or position settings. Higher number means I, II, III, greater speed)

Infinitely variable selector with off (speed is increasing from 0 setting) Arrow (action in the direction of arrow) Type or a characteristic of current Type or a characteristic of current Type or a characteristic of current Designates Double Insulated Construction tools Grounding terminal

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Symbols

Symbol

Designation/Explanation

Designates Li-ion battery recycling program.

Alerts user to read manual.

Alerts user to wear eye protection.

This symbol designates that this tool is listed by Underwriters Laboratories.
This symbol designates that this tool is listed by Underwriters Laboratories, to United States and Canadian Standards.
This symbol designates that this tool is listed by the Canadian Standards Association.
This symbol designates that this tool is listed by the Canadian Standards Association, to United States and Canadian Standards.
This symbol designates that this tool is listed by the Intertek Testing Services, to United States and Canadian Standards.

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Getting to Know Your Miter Saw

GCM18V-12SD Cordless Miter Saw

Fig. 1 1 2 3
7
8 9 10
11 12 13
14 15

6 25

12 15

16
22 13

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Getting to Know Your Miter Saw

1 Main Handle is used to raise and lower the head assembly and contains the power switch. Pull the handle down to lower the blade to the workpiece.
2 Switch Lock-OFF Release Buttons two buttons, one of which must be pressed before the power switch can be pressed.
3 Power Switch is used with the “Lock-OFF” button to turn the saw off and on.
4 Main Carry Handle is used to carry the saw.
5 Lower Guard Link allows for smooth movement of the lower guard.
6 Dust Chute directs sawdust up into the dust bag or vacuum hose.
7 Slide Rail Lock Knob when tightened, locks the slide system in place. Tighten by turning the knob clockwise (to the right), and loosen my turning counterclockwise (to the left).
8 Head Assembly Lock Pin is used to lock the head assembly in the lower position.
9 Bevel Post provides rotating support for all of the miter saw parts above the table.
10 Bevel Scale and Pointers indicates the current bevel angle. The large angled scale makes it easy to read bevel angles.
11 Bevel Range Selector Knob is used to select the left bevel range: 0° to 47° left or 0° to 47° right.
12 Sliding Fences support the workpiece. The fences have a cast-in scale to make repetitive cuts easy and have holes to secure an auxiliary fence if required.
13 Tool Mounting Pads in the four corners of the saw provide areas to clamp, bolt, or nail the saw to a flat work surface.
14 Cast-in Carry Handles are used to lift and transport the saw.

15 Stationary Fence is bolted to the base and supports the workpiece when the sliding fence is removed.
16 Base Extensions provide extra support for the saw, which can be useful when cutting long workpieces.
17 Miter Detent Plate can be adjusted to set the accuracy of its detent locations.
18 Miter Detents, are ten slots that allow for fast and accurate miter cuts at common miter angles.
19 Miter Scale and Pointer allows you to see the angle setting before a cut is made. The pointer rotates with the table and blade and points to the angle on the miter scale.
20 Miter Lock Knob locks the miter saw table at any desired miter angle.
21 Miter Detent Override Button locks out detent action, allowing for micro- adjustments to any miter angle.
22 Table provides workpiece support, rotates for desired miter cuts, and rotates the head assembly. The front extended part of the table is called the miter arm.
23 Rubber Deflector is attached to the bottom of the dust chute and deflects dust into the chute.
24 Chip Deflector prevents cut-off workpieces from entering the upper guard.
25 Blade is the component that makes cuts in workpieces. Use only 12″ (305 mm) diameter blades with 1″ (25.4 mm) diameter arbor holes.
26 Lower Blade Guard/Lower Guard Lip helps protect your hands from the spinning blade. It retracts as the blade is lowered. Should the guard become jammed on a workpiece, the lip can be used to raise the lower guard.
27 Upper Guard covers upper part of the blade.

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Getting to Know Your Miter Saw
Fig. 2

29
16 30
31 13

38 39
10 11

35 9

32 16 14

34
33 13

28 Head Assembly is the part of the saw that includes the blade, guards, motor, main handle, and dust collection system.
29 Arbor Lock, when pressed, keeps the blade from rotating. It’s used during blade removal or installation, when loosening or tightening the arbor bolt.
30 Base provides the working surface that supports the workpiece.
31 Miter Detent Plate Screws, four, accessible through holes in the miter scale, are loosened to allow the position of the detent plate to be adjusted.
32 Mounting Holes for Optional Crown Stop
33 Bevel Stop Indicators (Left and Right) allow you to select the most common bevel angles: 33.9°, 45°, or 47°.

34 Bevel Lock Knob locks the head assembly at the desired bevel angle.
35 Slide System allows the head assembly to smoothly slide in and out. It can be locked all the way to the rear or in the fully-extended position.
36 Dust Bag collects the dust from sawing operations. To empty it, uncouple it from the dust port and open the zipper at the bottom.
37 Chop/Crown Lock locks the head assembly in place for upright cuts and crown cuts.
38 Pivot Post provides support for and is the pivot point for the head assembly.
39 2x@45 Stop provides a stop for the head assembly for bevel cuts at 45 deg right bevel in 2x material.

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Getting to Know Your Miter Saw
Fig. 3 40 46 45

41 37
35

7 44

42 42

43 33
33 34

40 Battery Pack Release Button releases the battery pack so that it can be removed from the battery bay.
41 Battery Bay is where a Bosch or AMPShare battery pack (sold separately) is inserted.
42 Clamp Post Locations are two vertical post holes in the base provided to support the clamp.

43 Torx wrench is used to change the blade and to attach the base extensions.
44 Clamp is used to hold the workpiece to the table and base. The clamp is inserted into one of the clamp post locations.
45 Dust Port is the part that provides the connection to the dust bag or vacuum hose.
46 Battery Pack (sold separately)

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Specifications

GCM18V-12SD Cordless Miter Saw

Voltage: 18 V

Allowed ambient temperature: during charging
during operation during storage

32…113 °F (0…+45 °C) -4…122 °F (-20…+50 °C) 32…122 °F (0…+50 °C)

Battery Packs/Chargers Please refer to the battery/charger list, included with your tool.

Intended Use

Use this miter saw only as intended. Unintended use may result in personal injury and property damage.
This product is intended to cut wood, wood-like products, and non-ferrous metals. Dust build-up around the lower guard and hub from other materials (masonry or ferrous metal) may disable the lower guard operation.
Cutting Masonry/Metal
Do not cut ferrous metal or masonry with this miter saw. The dust from the ferrous metal or masonry cutting will cause the lower guard to become sluggish and may not close fully and quickly after cutting these materials.

Do not use abrasive wheels. This tool is not intended for usage with metal or masonry cut-off wheels.
Do not use Wet Diamond cutting off wheel or water feed devices with this miter saw. Masonry cutting waste will enter the lower guard system, harden and cause the guard to become inoperable. Use of water in masonry cutting applications with an electric miter saw will cause electric shock hazards.
This tool is not intended for usage with metal or masonry cut-off wheels.

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Cutting Capacities

Key Moldings / Positioning

Maximum Size

Base Molding Against Fence 38° Crown Molding Angled Against Fence 45° Crown Molding Angled Against Fence * Crown Molding Flat on Table

Within miter range of 0° to 47° Left
Miter / Bevel
0°/ 0° 45°/ 0° 0°/ 45° (Left) 0°/ 45° (Right)

6-3/4″ (172mm) 6-3/4″ (172mm) 7-1/2″ (191mm) 14″ (356mm)
Maximum Height 3-1/2″ (89mm) 3-1/2″ (89mm) 2″ (51mm) 1-1/2″ (38mm)

Miter / Bevel

Maximum Width

0°/ 0° 45°/ 0° 0°/ 45° (Left)

14″ (356mm) 10″ (254mm) 14″ (356mm)

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Unpacking and Checking Contents

Unpacking the Miter Saw
To avoid severe pinching, never lift or move this saw by gripping any component of the mechanism support system.
When removing this tool from packaging materials, reach down to the two side carry-handle locations and slowly lift until it clears the package.

Checking Contents in Package
Open the top of the package and look for the included loose parts (Fig. 4).
Some small parts must be attached to the tool before it is ready for use.

Fig. 4
Loose Parts
Torx Wrench (43)

Check off each part.

2 Workpiece Clamps (44)

Operating/Safety Instructions

2 Base Extensions (16)

Dust Bag (36)

4 Torx Screws for Base Extensions

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Tools Needed For Assembly

Verifying Parts
Check that you have the tools needed for the assembly of the saw, as shown in Fig. 5.

Checking Combination Square
Check that the combination square is true.
1. Position the square and draw a light line as shown in Fig. 6.
2. Flip the square as shown in Fig. 6.
3. Check the edge of the flipped square against the drawn line, and make sure there is no gap or overlap at the bottom end as shown in Fig. 6.

Fig. 5

Combination Square

Torx Wrench (43) (supplied)

Fig. 6
Position combination
square.
3/4″ (19mm) board with straight top edge

Draw line.

Flip square here. No gap or overlap.

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Assembly

To avoid possible injury, disconnect battery pack before performing any assembly, adjustments or repairs.

Storing the Torx Wrench
There is a storage location on the saw to store the Torx wrench (Fig. 7, 43). Insert the short leg of the Torx wrench through the rubber grommet as shown. Place the long leg into the tool rest.
NOTE: The Torx wrench (43) is needed to change the blade and to attach the side extensions. If lost, use a Torx 30 wrench or a key.
Fig. 7

Attaching the Base Extensions
Attach each base extension to the left and right side of the base:
1. Place the base extension (Fig. 8, 16) flush against the base.
Fig. 8
16

Torx screws

2. Using the Torx wrench (Fig. 7, 43) and the Torx screws provided (Fig. 8 and Fig. 9), attach the base extension (16) to the base.

Fig. 9

Torx screws

3. Using the Torx wrench (Fig. 7, 43), tighten both Torx screws until the base extension is fully seated against the base. Then tighten both Torx screws another 1/8 turn.
NOTE: To avoid overtightening and damaging the threads of the Torx screws, tighten the Torx screws by hand with the Torx wrench (43). Do not use a power screwdriver or impact wrench on the Torx screws.

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Assembly

Inserting and Releasing Battery Pack

Slide charged battery pack (Fig. 10, 46) into the battery bay (41) until the battery pack locks into position.

Your tool is equipped with a secondary locking latch to prevent the battery pack from completely falling out of the battery bay, should it become loose due to vibration.

To remove the battery pack, press the battery pack release button (40) and slide the battery pack completely out of the battery bay.

Fig. 10

Removing and Installing Blades
Always wear gloves when changing or handling blades. Blade tips can cause personal injury.
Removing Blade
1. Position the saw in the UP position and at 0° bevel. If in the DOWN position: while pressing down slightly on the saw head assembly, and pull out the head assembly lock pin (Fig. 11, 8). Then slowly allow the saw head assembly to come up.
Fig. 11
26

46 27

8 41

Blade bolt
25
5

2. Rotate the Lower Blade Guard (26) until there is clear access to the Blade Bolt.
3. Press and hold the arbor lock (the red button on the opposite side of the upper guard (27). Rotate the blade (25) slowly while pressing the arbor lock until it fully seats into its lock position.
4. Using the Torx wrench (Fig. 7, 43), loosen the blade bolt by firmly turning it clockwise.
NOTE: This bolt has left-hand threads.
5. Remove the blade bolt and outer washer. Carefully grab the blade. Slide the blade (Fig. 12, 25) away from the inner washer and off the arbor shaft, then down and away from the saw. Leave the inner washer on the arbor shaft.

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Assembly

Fig. 12
Outer washer

25
Inner washer

Blade bolt

Arbor shaft Support Ring

Installing 12″ (305mm) Blade
To avoid injury, do not use a blade larger or smaller than 12″ diameter and 1″ (25.4mm) arbor. The blade’s maximum plate thickness is 0.100″ (2.54mm). The blade’s maximum kerf thickness is 1/8″ (3.175mm).
To reduce risk of injury, use saw blade rated 5000/min (RPM) or greater.
After installing a new blade, make sure the blade does not interfere with the table insert at 0° and 45° bevel positions. Lower the blade into the blade slot and check for any contact with the base or turntable structure. If the blade contacts base or table, seek authorized service.
1. If a blade is currently installed, remove it as described in “Removing Blade” on page 19.
2. Carefully handle the new blade. Check that the rotation arrow on the blade matches the rotation arrow on the upper guard. Slide the blade up and between the sides of the chip deflector and over the arbor shaft. Move the blade so its arbor hole goes around the support ring of the inner washer (Fig. 11 and Fig. 12).
3. Place the outer washer over the arbor shaft and finger-tighten the blade bolt (counterclockwise). Check that the blade remained on the inner washer’s support ring.
4. Rotate the blade slowly while pressing the arbor lock until it fully seats into its lock position.
5. Using the Torx wrench (Fig. 7, 43), firmly tighten the blade bolt counterclockwise.

NOTE: This bolt has left-hand threads. Do not over tighten. A T30 Torx key may be used as an alternate.
6. Be sure the arbor lock is released so the blade turns freely.
7. Place the Torx wrench (43) back in the storage area.

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Assembly

Assembling Dust Collection System
The dust collection system used on this tool is attached to the upper guard (Fig. 13, 27). This placement provides superior dust collection for the majority of cuts. Disconnect battery pack (Fig. 10, 46) before attaching, adjusting or removing any dust collection component. Fig. 13
36
27
45
28 8

NOTE: Clean the bag at the end of the cutting session and before transporting or storing the saw.
Attaching a Vacuum Cleaner/Dust Extractor
The saw’s dust port (Fig. 14, 45) will accept the typical nozzles from 35 mm (13/8″) vacuum cleaner hoses, and Bosch VHSeries hoses.
To connect the saw with a 1¼” (32 mm) or 1½” (38mm) hose, the Bosch VAC024 adapter can be used (sold separately).
NOTE: the sizes above indicate the hose diameters and not the nozzle diameters.
Attaching to Vacuum Insert the vacuum nozzle into (or onto) the dust port (Fig. 14, 45) as far as it will go. Check to see that the vacuum hose is free from the mechanism and cutting path before reconnecting battery pack.
Fig. 14

13/8 (35mm)

hose

Attaching the Dust Bag
Attaching and Removing Dust Bag To attach the dust bag (Fig. 13, 36), squeeze the two red tabs together and slide the dust bag into the dust port rib.
Using and Cleaning the Dust Bag
Be extremely careful when disposing of dust. Materials in fine particle form may be explosive. Do not throw sawdust on an open fire. Spontaneous combustion, in time, may result from the mixture of oil or water with dust particles.
Using Dust Bag Attach the clean bag to the dust port (Fig. 13, 45).
Cleaning Dust Bag After the dust bag is 2/3 to 3/4 full, remove it from the saw. Bring the bag to a proper container and pull open the zipper located on the bottom of the bag. Hold the bag by the coupler end and shake it vigorously until all the dust and debris fall from it. Close zipper and reattach the bag.

Bosch VH-series hose

11/4 (32mm) hose

VAC024

45 11/2 (38mm)
hose

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Adjustments

To avoid possible injury, disconnect battery pack before performing any assembly, adjustments or repairs.

Using the Head Assembly Lock Pin
Head Assembly Lock Pin
The head assembly lock pin (Fig. 15, 8) is located on the left side of the pivot post (Fig. 2, 38). It is used to hold the saw’s head assembly (Fig. 13, 28) in the DOWN position. This position prevents the head from bouncing up and down during transportation. This also makes the saw more compact for lifting and storage. This position is also required for some calibrating procedures.
Fig. 15

2. Grasp the saw’s main handle (Fig. 15, 1) and press down on the head assembly (Fig. 13, 28).
3. While pressing the saw head down, push in on the head assembly lock pin (Fig. 15, 8). Release the head assembly. The head will be locked in the DOWN position.
To Disengage the Head Assembly Lock Pin
1. Grasp the main handle (Fig. 15, 1) and press down on the head assembly (Fig. 13, 28).
2. While pressing the head down, pull out the head assembly lock pin (Fig. 15, 8). Release the lock pin, but maintain your grip on the main handle. Slowly allow the spring-loaded saw head to come up to the top of its travel and then release the handle.

To Engage the Head Assembly Lock Pin
1. Check that the 2x@45 stop is disengaged, or pressed in to the right position. (See “2x@45 Stop” on page 42.)

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Adjustments

Miter Detent System Adjustment Procedure
Calibrating Miter Detent System
1. Engage the miter detent at the 0° position. Loosen the miter lock knob (Fig. 13, 20) 1/2 turn.
2. Loosen the 4 screws holding the detent plate (Fig. 16, 31) using the Torx wrench (Fig. 7, 43).
Fig. 16

side of the saw blade is in full contact with the other side of the square. 5. Tighten all four screws. Then loosen and reset the miter scale pointer to the “0” position (Fig. 17).
Miter Scale Pointer Adjustment
1. Rotate table (Fig. 18, 22) to 0° position and lock in place.
Fig. 18
Pointer Adjust Screw

3. Lock head assembly down using the head assembly lock pin (Fig. 13, 8).
4. Hold one side of a 90° combination square against the fence (Fig. 17, 12) and rotate the table (22) and detent plate (17) until the

22 19 0° Line
2. Raise the head assembly (Fig. 19, 28) to the full UP position.
Fig. 19

Fig. 17

Contacting

blade

11 34

Combination square
17

0° Miter Detent

3. Loosen the pointer adjust screw that holds the miter scale pointer (Fig. 18, 19) in place.
4. Position the pointer to align with the 0° line. Tighten the screw.

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Adjustments

0° Bevel Stop
Checking 0° Bevel Stop Setting
1. Hold the saw head assembly (Fig. 19, 28) down and push in the head assembly lock pin (Fig. 21, 8) to keep the saw in the DOWN position.
2. Slide the saw head assembly (Fig. 19, 28) completely to the back and engage the slide rail lock knob (7) by tightening the knob to the right (clockwise).
3. Rotate the table to the 0° miter position. 4. Rotate the bevel lock knob (34) clockwise to
unlock the head assembly. 5. Tilt the saw head assembly (28) to the left
(counterclockwise), then rotate to the right (clockwise) until you feel the stop in the vertical position. This is where the saw is currently set for 0° bevel cut. 6. Use a combination square (Fig. 20) to check that the blade is 90° (square) to the table (22). Place the square’s ruler edge against the table and slide it to contact the blade (25) with the vertical side of the square’s head. Fig. 20
25 12
Square’s 90° side
Combination square
22
7. Check that the saw blade’s plate (25), not the saw blade’s teeth, is touching the square’s 90° side. If the saw blade’s plate is not in full contact with the square’s body 90° side, see “Adjusting 0° Bevel Stop (Blade 90° to Table).”

Adjusting 0° Bevel Stop (Blade 90° to Table)
NOTE: Use a 4mm Hex wrench for the adjustment.
1. Lower head assembly (Fig. 19, 28) and engage head assembly lock pin (Fig. 21, 8).
Fig. 21

2. Slide the head assembly (28) completely to the back and engage the slide rail lock knob (7) by tightening the knob to the right (clockwise).
3. Rotate the bevel lock knob (34) clockwise to unlock the head assembly.
4. Make sure that the bevel range selector knob (Fig. 19, 11) is pushed back in position.
· Rotate the 0° bevel adjustment screw (Fig. 22) clockwise to adjust the head to the right.
· Rotate the 0° bevel adjustment screw (Fig. 22) counter-clockwise to adjust the head to the left.
5. Follow the procedure in “Checking 0° Bevel Stop Setting” to check your modifications. If further adjustment is required, repeat the steps above.

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Fig. 22

Adjustments

0° Bevel Adjustment Screw

45° Bevel Stop
Checking 45° Bevel Stop Setting
1. Hold the saw head assembly (Fig. 21, 28) down and push in the head assembly lock pin (8) to keep the saw in the DOWN position.
2. Slide the saw head assembly (28) completely to the back and tighten the slide rail lock knob (7).
3. Rotate the table to the 0° miter position.
4. Rotate the bevel lock knob (Fig. 19, 34) clockwise to unlock the head assembly.
5. Move the left sliding fence (Fig. 21, 12) fully to the left.
6. Check the position of the bevel stop indicator (Fig. 23, 33). It should be at the “45°” position.
Fig. 23

Lock nut
Bevel stop bolt

16099221PH GCM18V-12SD OSI 20220506.indd 25

7. Tilt the saw head assembly (Fig. 21, 28) to the left (counterclockwise) until it hits the 45° stop. This is where the saw’s 45° stop is set to make a 45° left bevel cut.
8. Use a combination square to check that the blade is 45° to the table. Remove the rule blade from the combination square (Fig. 24). Place only the combination square’s head on the saw’s table with its long flat side resting on the table and its 45° side against the tilted blade (25).
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Adjustments

Fig. 24

Square’s

45° side

Combination square

9. Check that only the plate of the saw blade (Fig. 24, 25), not teeth, is touching the square’s 45° side. If the saw blade’s plate is not in full contact with the square’s 45° side, follow the procedure “Adjusting 45° Bevel Stop (Saw Blade 45° to Table)” below.
Adjusting 45° Bevel Stop (Saw Blade 45° to Table)
To avoid possible injury, remove battery (Fig. 3, 46) before performing any assembly, adjustment or repair.
NOTE: Follow instructions when checking 45° bevel adjustment from the left or right side of miter saw.
Calibrating Blade at 45° Bevel
NOTE: Use a 10mm wrench for adjustment.
NOTE: Calibrating the bevel setting automatically calibrates the 33.9° and 45° left or right stops.
1. Lower saw head assembly (Fig. 21, 28) and engage head assembly lock pin (8).
2. Slide the saw head assembly (28) completely to the back and tighten the slide rail lock knob (Fig. 25, 7) by turning it clockwise (to the right).
3. Remove the sliding fences (Fig. 21, 12) completely to avoid hitting it with the saw head.
4. Check bevel stop indicators located on the left and right side of the bevel post on the table (Fig. 23, 33). It should be at 45°.
5. Rotate the bevel lock knob (Fig. 19, 34) clockwise to unlock the head assembly.

6. Locate the bevel stop bolt along the left or right side of the bevel post. This bolt features a lock nut (Fig. 23).
7. Loosen the bevel stop bolt a quarter turn and then loosen the lock nut. When this is complete you will be able to adjust the bevel stop bolt by hand.
· Rotate the bevel stop bolt clockwise to adjust the head to the lift.
· Rotate the bevel stop bolt counter-clockwise to adjust the head to the right.
8. Follow the procedure in “Checking 45° Bevel Stop Setting” on page 25 to check your modifications. If further adjustment is required, repeat the steps above.
9. Once satisfactory, lock the bevel lock knob (Fig. 19, 34) at 45° to prevent movement.
10. Finger tighten the lock nut (Fig. 23) in place. Once secured, tighten with wrench.

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Transporting and Mounting

To avoid possible injury, disconnect battery pack before performing any assembly, adjustments or repairs.

Lifting the Saw
To avoid injury, follow all statements identified below by the BULLET (·) symbol.
· Never lift the saw by gripping any of the sliding mechanism parts. The saw may move and cause severe injuries to your fingers or hands.
· To avoid back injury, hold the tool close to your body when lifting. Bend your knees so you can lift with your legs, not your back. Lifting the saw from the back is the preferred method. This will tip the tool toward your body.
· Never lift tool by holding switch handle. This may cause serious damage.
· Place the saw on a firm, level surface where there is plenty of room for handling and properly supporting the workpiece.

3. Lock the saw head assembly (Fig. 21, 28) in the DOWN position with the head assembly lock pin (8).
4. Slide the saw head assembly completely to the front and tighten the slide rail lock knob (Fig. 25, 7) by turning it clockwise (to the
right).
Lift the saw by the cast-in carry handles
With the saw facing you and the head mitered to a 60°, the saw head assembly (Fig. 21, 28) locked down, and the head in the forward position with the slide rail knob (Fig. 25, 7) tightened. Grip both cast in carry handles (14) located under the base extensions. Continue to lift and transport comfortably.

ONLY lift this saw by the cast-in carry handles at each side of the bottom of the base (Fig. 25, 14) or by the main carry handle (4).

Preparing To Lift The Saw
1. Set bevel angle at 0° and lock in place using the bevel lock knob (Fig. 19, 34).
2. Rotate the table to either 60° or 0° and lock into place using the miter lock knob (Fig. 25, 20).
Fig. 25 4
7

14 14
20

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Transporting and Mounting

Mounting Applications
Be certain the miter saw is mounted or placed on a level, firm work surface before using. A level and firm work surface reduces the risk of the miter saw becoming unstable.

Workbench Permanent Attachment

1. Each of the four mounting holes (Fig. 26) in the tool mounting pads (13) should be bolted securely using 5/16″ (M8) bolts, lock washers and hex nuts (not included).

Fig. 26

Mounting hole

mounting to ensure that no movement can occur during use. If any tipping or walking is noted, secure the workbench or stand before operating the miter saw.

Temporary Mounting Using Clamps

· If necessary, clamp the miter saw to a workbench or table top.

· Place two or more “C” clamps on the clamping areas (Fig. 27) and secure. There are clamping areas at all four corners of the saw.

· Mounting with clamps may prevent access to some wide miter angles.

Fig. 27

Clamping area 13

Clamping area

13 13

Mounting hole

2. Locate and mark where the saw is to be mounted.
3. Drill four 5/16″ (8mm) diameter holes through work-bench.
4. Place the miter saw on the workbench, aligning holes in base with holes drilled in workbench. Install bolts, lock washers and hex nuts.
Alternate Attachment
Be careful not to over-drive nail or over-torque the bolt. This could crack foot or damage base.
The smaller mounting holes at each corner can be used for nails or longer drywall screws.
The supporting surface where the saw is to be mounted should be examined carefully after

13 13
Clamping area

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13
Clamping area

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Preparing for Saw Operations

To avoid possible injury, disconnect battery pack before performing any assembly, adjustments or repairs.

Switch Activation
For safety, the power switch (Fig. 28, 3) is designed to prevent accidental starts. To operate safety switch, slide the switch “Lock-OFF” release buttons (2) with either thumb to disengage the lock, then pull the power switch (3) trigger and release the switch “Lock-OFF” release button. When the power switch trigger is released, the switch “Lock-OFF” release button will engage the power switch trigger automatically, and the lever will no longer operate until either “Lock-Off” release button is engaged again.
NOTE: Padlock hole (Fig. 28) can accommodate a padlock with a long shackle of up to 5/16″ (8mm) in diameter (not provided with miter saw) to prevent unauthorized use.
Fig. 28 2

Body and Hand Position
Position your body and hands properly to make cutting easier and safer. Failure to follow all instructions, identified below by bullet (·) symbols, may result in serious personal injury. (See Fig. 29 below.)
· Never place hands near cutting area. Keep hands and arms outside the “NO HANDS” zone.
Fig. 29

CORRECT

INCORRECT USE

Padlock hole

Projected Line of Cut

Built-in LED Light
Your tool is equipped with a powerful LED light for better visibility when cutting. The light has the ability to turn on when only partially depressing the trigger (Fig. 28, 3). The light will stay on for 30 seconds after the trigger has been released. This allows the cut to be more visible.

No Hands Zone
The “No Hands Zone” is an area 6 inches (152mm) wide on left and right side of the blade cutting path. Portion of the fence in this area also is considered a part of the “No Hands Zone.”
The “No Hands Zone” for zero miter and zero bevel cuts is marked on the tool with lines and “No Hands” symbols (Fig. 30).

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Fig. 30

Preparing for Saw Operations
Fig. 33

No-Hand Zone

(152 mm) (152 mm)

The “No Hands Zone” for all slide and miter right cuts (Fig. 31).
Fig. 31

6 (152

mm)

6 (152

mm)

No-Hand Tool
Blade

Bevel Angle
Upper Guard
Table Top
Zone

No-Hand Zone

6 (152 mm) 6 (152 mm)

The “No Hands Zone” for all slide and miter left cuts (Fig. 32).
Fig. 32

6 (152 mm)

No-Hand Zone

6 (152 mm)

Use sliding fence outside No Hands Zone
Use sliding fence (Fig. 34, 12) and additional workpiece supports to properly support the workpiece and hold or clamp it outside of the “No Hands Zone” (Fig. 30, Fig. 31, Fig. 32, Fig. 33).
Workpiece can be held against table (Fig. 34, 22) and fence (12) by hand only outside of the “No Hands Zone.”
· Hold workpiece firmly against table and fence to prevent movement.
· Keep hands in position until trigger has been released and blade has completely stopped.
· Never place hands on mechanism components.
· Keep feet firmly on the floor and maintain proper balance.
· Follow the miter arm when mitering left or right. Stand slightly to the side of the saw blade.

With all bevel cuts the “No Hands Zone” extends vertically up to the bottom of the upper guard when the head assembly is in the lowest cut position (Fig. 33).

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Fig. 34
44 12

Preparing for Saw Operations

Lip 26

If this occurs:
Workpiece must be securely clamped with clamp (Fig. 34 and Fig. 35, 44). This frees a hand to raise the lower guard (26) by the lip just enough to clear the workpiece.
Fig. 35

Workpiece

Dry Run
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands out of the path of saw blade.
It is important to know where the blade will intersect with the workpiece during cutting operations. Always perform the simulated cutting sequence with the battery pack disconnected and the power tool switched OFF to gain an understanding of the projected path of the saw blade. Mentally note where the path of the saw blade will fall and set up your work to keep your hands and arms out of the path of the spinning blade. Adjust your clamps and fences so that the smooth lower guard and cutting action are not interfered with during cutting operation.

Workpiece
Start the saw and begin your cut. Once you have cleared the position where the lower guard may bind, release the guard and it will continue to operate automatically as you cut.

Lower Guard
The lower guard (Fig. 34, 26) may not automatically open under certain cutting conditions; for example, when trying to cut workpieces that are near the maximum cutting height capacity. Under these conditions or during the blade travel motion of cut, the workpiece can stop the lower guard movement before the downward motion of the arm could pre-open the lower guard.

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Preparing for Saw Operations

Workpiece Support
Clamps
There may be extreme compound cuts where a clamp cannot be used. Support workpiece with your hand outside the “No Hands” zone. Do not try to cut short pieces that cannot be clamped and cause your hand to be in the “No Hands” zone.
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.
Using the Workpiece Clamp This clamp (Fig. 35, 44) easily secures a workpiece to the table or base.
1. Insert the clamp’s knurled bar down into a clamp post hole (Fig. 36, 42). There are two post holes located in the base behind the fence (Fig. 3). The knurled end must be in the post at least 1/2″ (13mm).
2. Slide the clamp down until its rubber foot contacts the workpiece.
3. Adjust the clamp height so it does not touch the sliding fence.
4. Rotate the clamp’s knob until the workpiece is firmly held in place.
5. Move saw head up and down and forward and back to be sure it clears the clamp.
Other Clamps Other hold-down devices such as C-clamps can be used to hold the workpiece firmly against the table (Fig. 36, 22) and the fence (12). Make sure the clamps are clear of the cutting path.
Sliding Fences
To provide sufficient spacing (minimum 6″) from hand to saw blade, extend the sliding fences (Fig. 36, 12) when making extreme bevel, miter, or compound cuts.

Operating Sliding Fences 1. Loosen the sliding fence lock knob (Fig. 36) counterclockwise ½ turn to loosen fence. 2. Slide fence (12) to the desired position. 3. Tighten the lock knob clockwise to lock sliding fence position.
Removing Sliding Fences The sliding fence (Fig. 36, 12) may need to be removed when preforming extreme bevel cuts and most compound cuts.
1. Loosen the sliding fence lock knob (Fig. 36) counterclockwise 6 rotations.
2. Lift and remove sliding fence (12). Fig. 36
12 Sliding Fence Lock Knob
42
22
Long Workpiece Support
Long workpieces have a tendency to tip over unless clamped down and properly supported from underneath. Do not use another person as a substitute for a table extension or as additional support. Unstable support for the workpiece can cause the blade to bind or the workpiece to shift during the cutting operation, causing you to contact the spinning blade.

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Preparing for Saw Operations

Additional Workpiece Support
Always ensure that supporting surfaces are able to properly support the workpiece and allow for secure holding by hand outside of the “No Hand Zone”, or clamping with a clamp inside or outside of the “No Hand Zone.” (See “Body and Hand Position” on page 29 for the “No Hand Zone” and the appropriate hand positions.)
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.
Blocks Long pieces need extra support. The base height (3-1/2″ / 89mm) is designed to match the standard lumber of one 4x or two 2x. Boards of these thicknesses can be used to create auxiliary support extensions for long workpieces (Fig. 37).
Fig. 37

Add one 4x or two 2x

26 28

Making an Auxiliary Fence

Check for interference between auxiliary fence and saw head components by performing a dry run. Fence interference can prevent proper saw operation and cause injury and/or tool damage.

Be aware of the path of the saw blade. Make a dry run with the saw OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.

Certain types of molding need a fence face extension because of the size and position of the workpiece. Holes are provided in the fence to attach an auxiliary fence. Only use the auxiliary fence with the saw in the 0° bevel position.

1. To create an auxiliary fence (Fig. 38), place a piece of wood against the sliding fence (Fig. 36, 12). Wood can have a maximum height of 5-1/2″ (140mm). Check that auxiliary fence assembly (Fig. 38) does not interfere with the saw head assembly (Fig. 37, 28).

Fig. 38

Auxiliary Fence

Flat head machine screws

Blade slot
2. Mark the locations of the support holes on the wood from the back side of the fence.
3. Drill and countersink the holes on the front of the support board.

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Preparing for Saw Operations

4. To fasten from front of fence: Attach (each) auxiliary fence using two (2) 3/16″ (M5) flat head machine screws (Fig. 38). With 3/4″ (19mm) auxiliary fence, use 1-1/2″ (38mm) long screws. Secure behind metal fence with washer and machine nuts.
To fasten from back of fence: With 3/4″ (19mm) auxiliary fence, use 1/4″ (M6) round head wood screws (3/4″/20mm long). Drill four pilot holes through auxiliary fence and run screws from rear of metal fence.

5. Make a full depth cut to create the blade slot. Check for interference between the auxiliary fence (Fig. 38) and the lower blade guard (Fig. 37, 26). Make adjustments as necessary.
6. For best splinter-free cuts, use the chop cut method.
7. When making slide cuts, the center must be notched out per pattern (Fig. 39).

Fig. 39
5-1/2″ (140mm)

9.5″ (240mm)

7″ (178mm)

4 mounting holes

Right Side

8-3/8″
1-3/4″ (45mm)

(213mm) 2-5/8″ (67mm)

SLIDE CUT NOTCH OUT
2-1/2″ (64mm)

Left Side

8-3/8″ 2-5/8″ (67mm)

(213mm)
1-3/4″ (45mm)

26″ (660mm)
Tall Auxiliary Wood Fence – 3/4″ (19mm) Thick

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Saw Operations

Brake Operation
The brake action of this saw is not intended as a safety feature. Remember to let the saw blade come to a complete stop before raising the blade from the workpiece. As always, the guard system is your best protection against unintentional contact with a spinning saw blade. NEVER wedge open or defeat the closing action of the lower guard.
Know the charge state of your battery. The electric braking action is initiated ONLY by the release of the trigger switch and in a tool that has power available. When electrical power is lost due to a discharged battery or other causes, the electric brake will not operate, and the motor will gradually slow down. Unexpected rundown time may cause property damage and/or personal injury.
Your saw is equipped with an automatic electric brake which is designed to stop the blade from spinning in about five (5) seconds after you release the trigger switch. It is useful when making certain cuts in wood where a coasting blade would result in a wide, imprecise cut.
Braking starts once the power is turned off.
The brake requires a charged battery to function. Stopping time will vary depending on, among other factors, saw blade used, and number of actuations. The electric brake of your miter saw has been designed for a high degree of reliability, but unexpected circumstances such as contamination or failure of the motor’s components can cause the brake to not activate. If the tool operates but the brake does not consistently stop the blade in about 5 seconds, DO NOT use the miter saw and have it serviced by a Bosch Factory Service Center or Bosch authorized service facility.

Chop/Crown Lock
This saw is equipped with a Chop/Crown lock feature (Fig. 40, 37) that is intended to lock the head assembly in place while giving the maximum capacity for upright cuts and crown cuts.
Engaging Head for Chopcuts and Crown Molding
To make upright cuts against the fence, up to 6-3/4″ tall, engage the Chop/Crown feature:
1. Loosen the slide rail lock knob (Fig. 40, 7) by turning it counterclockwise.
2. Slide the head assembly (Fig. 37, 28) forward and rotate the chop/crown lock (Fig. 40, 37) into position.
3. Lock the slide system in place by turning the Slide Rail Lock Knob clockwise.
Fig. 40
7
37

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Saw Operations

Using the Miter Lock Knob
1. Loosen the miter lock knob.
2. While holding the knob in your palm, push the miter detent button, rotate table left or right to needed miter angle, and release the button.
3. Once at the correct angle, tighten the knob by rotating it clockwise.
NOTE: It is recommended to tighten the miter lock knob before all cuts. It is required to tighten the knob before cutting at any angle between detent engagements or when the miter detent override system is in use.

Miter Detent Override

The miter detent override button (Fig. 42, 21) allows the miter detent action to be locked out, allowing for micro adjustments at any miter angle. When the desired miter angle is too close to a standard mitering angle that has a detent slot (18), this feature prevents the wedge on the miter detent system from slipping into the detent slot on the miter detent plate (17).

Fig. 42 19

table arm

Using Miter Detent System

1. Loosen the miter lock knob (Fig. 41, 20) about 1/2 turn.

Fig. 41

22 18 17

2. Grip the miter lock knob (20), and then push the miter detent override button (21) down with your thumb and push until the button is out from the detent plate (17).
3. While gripping the miter lock knob (20) and miter detent override button (21), rotate the saw’s table (22). Stop table rotation at the desired angle as indicated by the miter scale pointer (19).
4. Release the lever into a detent (18) in the detent plate (17) or at an angle between detents. If close to a detent, use the detent override feature.
5. Tighten the miter lock knob (20) by rotating it clockwise before cutting.
NOTE: It is recommended to tighten the miter lock knob (20) before all cuts. It is required to tighten the knob before cutting at any angle between detents (18) or when the miter detent override system is in use.

1. Push the miter detent override button (21) down.
2. Push the miter detent override button (21) forward and latch in place under receiving edge on the table arm (Fig. 42).
3. Rotate the table (22) to any position on the miter scale (19).
4. Tighten the miter lock knob (20) by rotating it clockwise to retain the miter position.
To Disengage:
Push down and pull the miter detent override button (Fig. 42, 21) and the table (22) should lock into any desired miter detent (18).

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Saw Operations

Chop Cuts
What’s a Chop Cut?
· A “chop cut” is a cross-cut made when the saw is held to the rearmost position and is operated like a conventional (non-sliding) miter saw. Using the chop cut method lowers the cross-cutting capacity. However, many users prefer this method because it is quicker when making repeat cuts. This method can also produce more accurate cuts because the saw head is locked in the retracted position.
· This saw has bevel angle stops that accurately stop at critical angles: 45° Left/ Right and 0° Right. It comes factory-set and should not require adjustment. However, after extensive use or if the tool has received a hard impact, it may require an adjustment.
· A chop cut can cut pieces with a width of 5-1/2″ (140mm) or less.

Making a Chop Cut
1. Activate the switch (Fig. 1, 3), then fully lower the saw head assembly (Fig. 43, 28) to make the cut.
2. Hold the saw head assembly down until the blade comes to a complete stop. Return the the saw head assembly to the UP position. Remove workpiece.
Fig. 43
28

Preparing for Chop Cut
Use clamping position that does not interfere with operation. Before switching “ON”, lower head assembly to make sure clamp clears guard and head assembly.
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.
1. With the saw head assembly (Fig. 43, 28) in the UP position, push it back over the fence to the rear.
2. Turn the slide rail lock knob (Fig. 40, 7) clockwise to lock it.
3. Properly position your workpiece and clamp it firmly to the table (Fig. 44, 22), the fence (12), or both.

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Saw Operations

Slide Cuts
What’s a Slide Cut?
NEVER pull the saw toward you during a cut. The blade can suddenly climb up on top of the workpiece and force itself toward you.
· A “slide cut” is made with the head assembly (Fig. 44, 28) unlocked and able to move away from the fence (12). This movement is supported and precisely controlled by the slide system (35). The maximum crosscutting capacity is utilized by using this method.
Fig. 44 1

inches (152mm) away from the projected path of the saw blade.
1. Place the saw head assembly (Fig. 44, 28) in the UP position.
2. Loosen the slide rail lock knob (7) by turning it counterclockwise (to the left).
3. With the head assembly (28) in the UP position, move it fully to the front and back to check that the slide system (35) moves smoothly.
4. Properly position your workpiece and clamp it firmly to the table (22), the fence (12), or both.

Making a Slide Cut
1. With the head assembly (Fig. 44, 28) in the UP position, grasp the main handle (1) and move the head assembly fully to the front and away from the fence (12).
2. Activate the switch (Fig. 1, 3), and then fully lower the saw head assembly (Fig. 44, 28) (Fig. 45, actions 1 and 2). On larger pieces, this action may also start the cut.
Fig. 45

· A slide cut is best used for cross-cutting workpieces wider than can be done with a chop cut pieces wider than 5-1/2″ (140mm) and up to a maximum width of 14″ (356mm) across.
Preparing for Slide Cut
Use a clamping position that does not interfere with operation. Before switching “ON,” lower head assembly (Fig. 44, 28) to make sure clamp clears guard and head assembly.
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6)

3. Push down and back so the saw head assembly moves toward the fence (Fig. 44, 12) and to the full rear position until you complete the cut (Fig. 45, action 3).
NOTE: If high resistance is felt, do not apply excessive force stop cutting, wait until blade stops and investigate problem.
4. Hold the saw head down until the blade comes to a complete stop. Return the saw head to the UP position and remove the workpiece.

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Saw Operations

Miter Cuts
What’s a Miter Cut?
· A “miter cut” is a cross-cut made with the blade perpendicular to the horizontal table (Fig. 44, 22). The blade is not tilted and the bevel pointers are both on the 0° lines.
· Miter cuts can be made at any angle across a workpiece within this saw’s range, from 52° left to 60° right.
· The miter scale (19) shows the angle of the blade relative to the saw’s fence (12). The miter pointer is attached to the table (22) and indicates the saw’s miter position before the cut is made.
· Ten positive detents (18) are provided for fast and accurate preset miter angles locations are at 45°, 31.6°, 22.5°, 15° left and right, and center at 0°. The right side has an additional detent of 60°.
· The crown molding detents on the left and right are at 31.6° for compound cutting 38° “spring angle” crown molding lying flat on the table. See “Cutting Crown Molding” on page 45.

· For precision settings at miter angles very close to the miter detents, use the miter detent override to prevent the detent from automatically engaging the detent slot. See “Miter Detent Override” on page 36.
· A miter cut can be made either as a chop cut or slide cut, depending on the width of the workpiece.
Reading the Miter Scale
The miter scale (Fig. 44, 19 and Fig. 46) used on this saw includes several scales of information to help the user accurately preset this saw before making the cuts.
Pitch angle information The top section of the miter scale (Fig. 46) shows angle settings required to cut roof rafters to the “Pitch Angle” system. 2/2, 4/12, 6/12, etc., are all pitch angles. This system is based on using the English “inches.” A 6/12 pitch angle roof equals a ratio of 6″ “rise” for every 12″ “run” (Fig. 47).
Crown molding information There are miter position settings for compound- cutting crown molding flat on the table. Crown molding with 38° “spring angle” uses the 31.6 setting (with detent) and crown molding with 45° “spring angle” uses the 35.3 setting.

Fig. 46

Miter scale information
Calibration information Pitch angles for roofs

1 of 10 Detent Symbols

“31.6” detent position for cutting 38° “spring angle” crown molding flat on table “35.3” detent position for cutting 45° “spring angle” crown molding flat on table
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Saw Operations

Fig. 47

12 rise

45R°o(osfloapneg)le

12 rise

r2iRs66eo.5o6f°a(nsglolep=e) 12 rise

rafter 12/12

rafter 6/12

Setting Saw to Make a Miter Cut
Use a clamping position that does not interfere with operation. Before switching ON, lower head assembly to make sure clamp clears guard and head assembly.
1. See “Using Miter Detent System” on page 36.
2. Loosen the miter lock knob (Fig. 49, 20). Push miter detent override button (21) and move the saw to the desired angle, using either the detents (18) or the miter scale (19). Tighten miter lock knob (20).
Fig. 49

NOTE: This cutting method also requires that specific bevel angles are set. See “Cutting Crown Molding” on page 45.
Miter cutting 6-3/4″ (171mm) base boards This saw can miter cut 6-3/4″ (171mm) tall base boards (Fig. 48) vertically positioned against the fence (12) at any angle from 47° left to 47° right miter. All angled cuts must be made with the base board placed on the left side of the table (22). For certain cuts, the base board will have to be flipped upside down or placed with the face side against the fence. Always use a Cclamp (Fig. 48) to hold the base board to the fence before making cuts. Engage the Chop/ Crown Lock. See “Chop/Crown Lock” on page 35.
Fig. 48

C-clamp

Base board

12 12

Workpiece
44 12

28 12

22 18 19

21 20

3. Extend the fence (12) on the side on which the cut will be made. See “Workpiece Support” on page 32.
4. Properly position workpiece. Make sure workpiece is clamped firmly against the table (Fig. 48, 22) with a clamp (Fig. 49, 44) or against the fence with a C-clamp (Fig. 49).
5. Follow either the procedure “Chop Cuts” on page 37 or “Slide Cuts” on page 38.
6. Wait until saw blade comes to a complete stop before returning head assembly (Fig. 49, 28) to the raised position and then remove workpiece.

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Saw Operations

Bevel Cuts
What’s a Bevel Cut?
A “bevel cut” is a cross-cut made with the blade perpendicular to the fence (Fig. 49, 12) and with the table (22) set at 0° miter. The blade can be tilted to any angle within the saw’s range: 47° left and 47° right from the vertical.
The bevel scale is sized and positioned for easy reading (Fig. 50, 10 and Fig. 51). The bevel lock knob (Fig. 52, 34) is to lock and unlock the various settings.

Rotating bevel stop indicators (Fig. 50 and Fig. 52, 33) allow you to set the most common bevel stops: 33.9°, 45° and 47° Left and Right (Fig. 51). The 33.9° bevel stop is for cutting 38° “spring angle” crown molding flat on the table. For more information, see “Compound Cuts” on page 43.
Fig. 52

Fig. 50

Lock nut

Bevel stop bolt

10 11

34 33

Fig. 51

Bevel scale information

Watch while tilting to right

Watch while tilting to left

“30” position for cutting 45° “spring angle” crown molding flat on table
16099221PH GCM18V-12SD OSI 20220506.indd 41

“33.9” positions are for cutting 38° “spring angle” crown molding flat on table NOTE: Saw has a 33.9 detent feature to automatically hold it at this bevel angle setting
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Saw Operations

Setting Saw to Make a Bevel Cut
1. Extend the fence. See “Sliding Fences” on page 32.
NOTE: Be sure to move the sliding fence (Fig. 49, 12) away from the blade to avoid cutting into the fence when bevel cutting. The sliding fence may need to be removed when performing extreme bevel cuts and most compound cuts. See “Sliding Fences” on page 32.
2. Rotate the bevel lock knob (Fig. 52, 34) clockwise to unlock the head assembly.
3. Adjust your left or right bevel stop indicator (33) to one of the three pre-set locations, 33.9°, 45°, 47°, or tilt the head assembly (Fig. 49, 28) until you reach the desired angle on your bevel scale (Fig. 51 and Fig. 52, 10).
NOTE: To bevel the saw to the right, the Bevel Range Selector Knob must be pulled forward (Fig. 52, 11).
4. Rotate the bevel lock knob (Fig. 52, 34) counterclockwise to lock the head assembly.
5. Follow either the procedure “Chop Cuts” on page 37 or “Slide Cuts” on page 38.

2x@45 Stop
Before making a right bevel cut on a workpiece that is thicker than 1 inch (26mm), engage the 2x@45 stop (Fig. 53, 39) by rotating the lever counterclockwise.
The 2x@45 stop does not have to be engaged for workpieces less than 1 inch (26mm) thick.
Fig. 53 39

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Saw Operations

Compound Cuts
For compound cutting, adjust sliding fence (Fig. 54, 12) clear of blade path and guard system. Before sawing, always check that there is no interference between moving and stationary parts of the saw. These miter and bevel combinations may result in interference between the sliding and stationary parts of the saw or between the sliding parts and the work piece. Fig. 54
10 12
22 19 Workpiece
What’s a Compound Cut?
· A “compound cut” is a single cross-cut made with the saw blade preset at two angles combining a miter angle (relative to the vertical fence) with a bevel angle (relative to the horizontal table).
· Miter angles will be with the table rotated away from 0° and within this saw’s range from 52° left to 60° right.
· A bevel angle is when the blade is tilted away from 0°. This saw’s range is from 47° left to 47° right.
· A compound cut can be made as a chop cut or a slide cut. (See “Chop Cuts” on page 37 or “Slide Cuts” on page 38.)

Making a Compound Cut
Use clamping position that does not interfere with operation. Before switching ON, lower head assembly to make sure clamp clears guard and head assembly.
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.
Follow these instructions for making your compound cut:
1. Extend the fence (Fig. 54, 12).
2. Properly position workpiece. Make sure workpiece is clamped firmly against the table (22) or the fence (12).
3. Set miter angles for miter cuts according to the instructions in “Miter Cuts” on page 39, and set bevel angles for bevel cuts according to the instructions in “Bevel Cuts” on page 41.
4. Follow the procedures “Chop Cuts” on page 37 or “Slide Cuts” on page 38.
5. Wait until saw blade comes to a complete stop before returning head assembly (Fig. 49, 28) to the raised position and then remove workpiece.
Cutting crown molding flat on the table (22) requires compound cuts. See “Cutting Crown Molding” on page 45.

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Saw Operations

Cutting Base Molding
Base molding can be cut vertical against fence (Fig. 54, 12) or flat on the table (22). The maximum size that can be vertical on the fence is 6-3/4″ (171mm), flat on table is 13-1/2″ (343mm).
See the “Base Molding Cutting Instructions” table below for helpful hints on cutting base molding for corners that have 90° angles.

Cutting base molding can be done either as a chop cut or a slide cut depending on the size of the workpiece. (See “Chop Cuts” on page 37 or “Slide Cuts” on page 38.)

Base Molding Cutting Instructions

LOCATION OF MOLDING ON SAW

Bevel Angle

Molding piece being cut

Inside corner of wall

Miter Angle
Position of molding on
saw

Molding in Vertical Position:

Molding in Horizontal

Back of molding is against Position: Back of molding is

the fence

flat on the table

Bevel = 0º

Bevel = 45º

To left of corner
Left at 45º

To right of corner
Right at 45º

To left of corner
0º

To right of corner
0º

Bottom

Top against Top against

against table against table

fence

Finished side

Keep left side of cut

Keep right side of cut

Keep left side of cut

Outside corner of
wall

Miter Angle Position of molding on
saw
Finished side

Right at 45º
Bottom against table
Keep left side of cut

Left at 45º

0º

Bottom

against table against fence

Keep right side of cut

0º
Top against fence
Keep right side of cut

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Saw Operations

Cutting Crown Molding
Crown molding cuts must be positioned properly to fit exactly.
There are two ways to cut crown molding: flat on table or angled to table and fence.
See the “Miter and Bevel Settings for Standard Crown Molding Cuts (When Workpiece Angled Against Fence)” table below for helpful hints on cutting crown molding for corners that have 90° angles.
Crown molding’s “spring angle” is the angle between the back of the molding and the bottom flat surface that fits against the wall.
This miter saw has special miter detents at 31.6° and bevel detents at 33.9°. These detents allow you to easily position most crown molding flat on the table (Fig. 54, 22) and make precise cuts for 90° corners.
NOTE: These detents cannot be used with 45° crown molding. These detents are only for use with crown molding that has a 38° “spring angle.”

Also see “Crown Molding Lying Flat on Table” on page 47 for miter and bevel angles for cutting crown molding that has 38° and 45° spring angles. The table “Miter and Bevel Settings for Standard Crown Molding Cuts (When Workpiece Angled Against Fence)” below lists the exact miter and bevel settings required for a wide range of corner angles.
Even though these angles are standards, most rooms do not have angles of exactly 90°; therefore, you will need to fine-tune your settings.
The optional Bosch GAM 220 MF and GAM 270 MFL Digital Anglefinder/Protractors measure spring angles and corner angles, then automatically determine the exact miter and bevel settings necessary to make each crown molding cut fit perfectly.

Miter and Bevel Settings for Standard Crown Molding Cuts (When Workpiece Angled Against Fence)

Any Crown Molding Up To 6″ (152mm)

NOTE: Always place bottom edge against
fence

Miter (Table) Setting

Bevel (Tilt) Setting

Assumptions: Molding is milled consistently. Corner is 90°. For other corner angles, divide actual measurement by 2.
Fig. 55

Inside Corner
Left end (Fig. 55, A) Use the left end of the cut
Right end (Fig. 55, B) Use the right end of the cut
Outside Corner
Left end (Fig. 55, C) Use the left end of the cut
Right end (Fig. 55, D) Use the right end of the cut

45° Right 45° Left
45° Left 45° Right

0° Left 0° Right
0° Right 0° Left

Inside Corner
Fence

Outside Corner

Top of molding against fence

Table

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Saw Operations

Crown Molding Angled to Table and Fence
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.
The preferred method for cutting crown molding with this saw is with the molding lying flat on the table.
The advantage to cutting molding angled against fence (Fig. 56, 12) is that no bevel setting is required. Only the miter angle is adjusted.
The maximum crown molding width that can be cut and angled to table and fence is 6-1/2″ (165mm).
When cutting crown molding in this fashion it is recommended to purchase and use the optional Crown Stop Set (Fig. 56). Engage the Chop Crown Lock (37).

Follow these instructions for cutting crown molding angled to table and fence.
1. Position the molding so the bottom edge (Fig. 56), the decorative part, which is installed against the wall, is against the fence (12).
2. For 90° corner, set the miter angle using chart below. Tighten the miter lock knob (20).
3. Support crown molding against the fence (12). (See “Body and Hand Position” on page 29.)
4. Follow either the procedure “Chop Cuts” on page 37 or “Slide Cuts” on page 38.
5. Wait until saw blade comes to a complete stop before returning head assembly (28) to the raised position and then remove workpiece.
NOTE: Always take a test cut using scrap to confirm correct angles.

Fig. 56

Bottom edge of molding

12 Crown molding angled against fence
Optional Crown Stop
20

45° miter

28
37 Optional Crown Stop

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Saw Operations

Crown Molding Lying Flat on Table
Use clamping position that does not interfere with operation. Before switching “ON”, lower head assembly to make sure clamp clears guard and head assembly.
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.
NOTE: Position workpiece with its back flat on the saw table (Fig. 57, 22).
Fig. 57

Crown molding

44 12

22 19

Bevel Scale Settings

Miter Scale Settings

Always place top edge of molding against fence (12). (The decorative edge is at the bottom of crown molding.)
“Spring angle” refers to angle between wall and crown molding.
Cutting crown molding flat on the table (22) can be done either as a chop cut or a slide cut depending on the width of the workpiece.
For narrow cutoffs when cutting crown flat on table, you will need a special auxiliary fence. See “Making an Auxiliary Fence” on page 33.
1. For 90° corner, set the bevel and miter angles, see the “Miter and Bevel Settings for Standard Crown Molding Cuts (With Molding Flat on Table)” table. Tighten the miter lock knob (20) and the bevel lock knob (Fig. 52, 34).
2. Position molding on saw table (Fig. 57, 22). Clamp workpiece in place using the quick clamp (44).
3. Follow either the procedure “Chop Cuts” on page 37 or “Slide Cuts” on page 38.
4. Wait until saw blade comes to a complete stop before returning head assembly (Fig. 56, 28) to the raised position and then remove workpiece.
NOTE: Always take a cut using scrap to confirm correct angles.
See the “Miter and Bevel Settings for Standard Crown Molding Cuts (With Molding Flat on Table)” table for helpful hints on cutting crown molding for corners that have 90° angles.

35.3 35.3

30 40 33.9

35 3031.6

33.9

31.6

For 45° spring angle

For 38° spring angle

For 45° spring angle

For 38° spring angle

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Saw Operations

Miter and Bevel Settings for Standard Crown Molding Cuts (With Molding Flat on Table)
Assumptions: Molding is milled consistently. Corner is exactly 90°.

NOTE: Always place top edge against fence

Molding Spring Angle 38°

Miter (Table) Bevel (Tilt)

Setting

Molding Spring Angle 45°

Miter (Table) Bevel (Tilt)

Setting

Inside Corner
Left end (Fig. 58, A) Use the left end of the cut
Right end (Fig. 58, B) Use the right end of the cut

31.6° Right 31.6° Left

33.9° Left 33.9° Right

35.3° Right 35.3° Left

30° Left 30° Right

Outside Corner
Left end (Fig. 58, C) Use the left end of the cut
Right end (Fig. 58, D) Use the right end of the cut

31.6° Left 31.6° Right

33.9° Right 33.9° Left

35.3° Left 35.3° Right

30° Right 30° Left

Fig. 58
Inside corner

Outside corner

Fence

Top of molding against fence

Table

Wall

Ceiling 52°
38°
38/52° crown molding
38° spring angle

Ceiling 45°
45°
45/45° crown molding
45° spring angle

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Saw Operations

Crown Molding Auxiliary Fence
When making a compound cut on a molding lying flat on the table, narrow cut- off pieces, 2″ (50mm) or less in width, may be propelled at high speed over the fence and beyond the back of the tool (Fig. 59). Use auxiliary fence (Fig. 60) as instructed below.
AFnig.a5u9xiliary fence (Fig. 60) is used to add support to the cut-off workpiece such as large crown molding when cut flat on the table (Fig. 59, 22). It will reduce splintering and movement of the unsupported cut-off piece of wood after the cut is made.

Small

cut-off 22

piece

Fig. 60

Making an Auxiliary Fence
Required pieces:
· Wood Board (described below)
· 4 Flat Head Machine Screws 1/4″ diameter (M6); 2-1/2″ (65mm) long
· 4 1/4″ (M6) Flat Washers
· 4 Nuts
To make an auxiliary fence:
1. Cut a nominal 1″ x 2″ wood board to a length of 26-1/16″ (662mm) long.
NOTE: 1″ x 2″ nominal equals 3/4″ x 1-1/2″ (19x38mm) actual. 3/4″ (19mm) plywood cut to size may be substituted.
2. Drill four holes through the board using a 5/16″ (8mm) diameter drill bit. Countersink the holes deep enough so that the flat head screws will rest below the front work surface use a 1/2″ (13mm) diameter drill bit (Fig. 61).
3. Remove the saw’s sliding fences. See “Sliding Fences” on page 32.
4. Place the flat head screws through the holes in the auxiliary fence, then the holes in the stationary fence on the tool.
5. Place the washers and nuts over the screw threads and against the stationary fence. Tighten nuts.

Small cut-off
piece

Auxiliary fence

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Saw Operations

Fig. 61

OVERALL HEIGHT = 1-1/2″ (38mm)

OVERALL LENGTH = 26-1/16″ (662mm)

8″ (203mm)

8-7/32″ (207mm)

3-1/4″ (83mm)

3-3/8″ (86mm)

1/2″ (13mm)

Drill 4 holes = 5/16″ (8mm) diameter

Nut (need 4) Flat washer (need 4)

New auxiliary fence Board: 3/4″ Wide x 1-1/2″ High (19x38mm)
5/16″ (8mm) hole through
1/2″ (13mm) countersink

Stationary fence

Saw base

1/4″ (M6) flat head machine screw x 2-1/2″ (65mm) long (need 4)

Top of base and table

NOTE: The stationary fence is permanently attached to the saw base (do not remove).

New auxiliary fence (assembled to miter saw)

Stationary fence

Saw base

Top of base and table

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Saw Operations

First-Time Use of the Auxiliary Fence
Be aware of the path of the saw blade. Make a dry run with the saw OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.
NOTE: The first time the auxiliary fence is used, it will be cut through by the saw blade cutting through creates minimal clearance which reduces splintering on the workpiece. Set the miter angle and the bevel angle required before making the first cut.
Clamp the workpiece, then make cut. Example: compound cutting large crown molding flat on the table (Fig. 57).
Auxiliary Fence Using an Auxiliary Fence when cutting crown molding flat on the table will reduce splintering of your workpiece and movement of small cut- off pieces. Before attaching the auxiliary fence, remove the saw’s sliding fences. See “Sliding Fences” on page 32.
Build auxiliary fence by following pattern in Fig. 61 Material: 3/4″ x 1-1/2″ (19x38mm) wood.
Add 4 holes as dimensioned on pattern or add holes following the following steps:
1. Cut wood to the outside dimensions shown and temporarily attach to saw’s stationary fence (Fig. 57, 12) using two C-clamps.
2. Use 1/4″ (6mm) drill bit to drill first through existing holes in the rear of the stationary fence (12) and then through the wood.
3. Remove wood, countersink the front of the wood and permanently attach to saw’s fence (12) with hardware shown in Fig. 61.

Special Cuts
Use clamping position that does not interfere with operation. Before switching on, lower head assembly to make sure clamp clears guard and head assembly.
Be aware of the path of the saw blade. Make a dry run with the battery pack disconnected and the saw switched OFF by conducting a simulated cutting cycle, and observe the projected path of the saw blade. Keep hands at least six (6) inches (152mm) away from the projected path of the saw blade.
To provide sufficient (minimum 6″ [152mm]) spacing from hand to saw blade, extend the sliding fence and base extensions when making extreme bevel, miter or compound cuts.
Cutting bowed material and round material are only two examples of special cuts.
Cutting Bowed Material
If workpiece is bowed or warped, clamp it with the outside bowed face toward the fence (Fig. 62, 12). Always make certain that there is no gap between the workpiece, fence and table (22) along the line of cut. Bent or warped workpieces can twist or rock and may cause binding on the spinning saw blade while cutting.
Fig. 62
22

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Bowed material

No gap at this point

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Saw Operations
Cutting Round or Irregularly Shaped Material
For round material such as dowel rods or tubing, always use a clamp (Fig. 63, 44) or a fixture designed to clamp the workpiece firmly against the fence (12) and table (22). Rods have a tendency to roll while being cut, causing the blade to “bite” and pull the work with your hand into the blade. Fig. 63
12 44
12
22 Round material

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Maintenance and Lubrication

To avoid accidents, always disconnect battery pack from tool before cleaning or performing any maintenance.

Service
All tool service should be performed by a Bosch Factory Service Center or an Authorized Bosch Service Station. Preventive maintenance performed by unauthorized personnel may result in misplacing of internal wires and components which could cause serious hazard.
Batteries
Be alert for battery packs that are nearing their end of life. If you notice decreased tool performance or significantly shorter running time between charges then it is time to replace the battery pack. Failure to do so can cause the tool to operate improperly or damage the charger.
Care of Blades
Blades become dull even from cutting regular lumber. If you find yourself forcing the saw forward to cut instead of just guiding it through the cut, chances are the blade is dull or coated with wood pitch.
When cleaning gum and wood pitch from blade, unplug the saw and remove the blade. Remember, blades are designed to cut, so handle carefully. Wipe the blade with kerosene or similar solvent to remove the gum and pitch. Unless you are experienced in sharpening blades, we recommend you do not try.

Bearings
All bearings in this tool are lubricated with a sufficient amount of high- grade lubricant for the life of the unit under normal operating conditions. No further lubrication is required.
Cleaning
Certain cleaning agents and solvents damage plastic parts. Some of these are: gasoline, carbon tetrachloride, chlorinated cleaning solvents, ammonia and household detergents that contain ammonia.
Ventilation openings and switch levers must be kept clean and free of foreign matter. Use a brush to remove dust and debris from the vent openings and the guard mechanisms. Do not attempt to clean by inserting pointed objects through openings.
Regularly check to make sure the lower guard and all moving parts are working properly. Regularly check that the lower guard can move from the fully open to fully closed position without interference. Ensure that the lower guard moves to the fully closed position when the Main Handle is moved to the raised position.

Tool Lubrication
Preventive maintenance performed by unauthorized personnel may result in misplacing of internal wires and components which could cause serious hazard. We recommend that all tool service be performed by a Bosch factory Service Center or Authorized Bosch Service Station.
Periodically lubricate moving parts with a silicone, or light oil spray. Do not use grease because it tends to attract and hold sawdust.

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Troubleshooting

Troubleshooting Guide – Electrical

PROBLEM Brake does not stop blade in about 5 seconds. Motor does not start.
LED light flashing, motor does not start.

CAUSE 1. Blade bolt loose. 2. Other. 1. Battery pack not
charged. 2. Battery pack not in-
stalled properly. 3. Battery pack tempera-
ture is too hot or cold for operation. 4. Electronic Motor Protection turned tool off. 5. Burned out switch. 6. Other.
1. Tool is over heated. 2. Battery is over heated.

CORRECTIVE ACTION
1. Tighten blade bolt.
2. Authorized service.
1. Charge battery if needed.
2. Confirm battery is locked and secured to the tool.
3. Let battery sit a few minutes or until it reaches normal operating temperature.
4. Remove battery an replace.
5. Let tool sit a few minutes or until it reaches normal operating temperature.
6. Have switch replaced by an Authorized Bosch Service Center or Service Station.
7. Authorized service.
1. Let tool cool down.
2. Exchange the battery.

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Troubleshooting

Troubleshooting Guide – General

PROBLEM

CAUSE

CORRECTIVE ACTION

Head assembly does not bevel to desired position.

1. Bevel detent pin is engaged and locks bevel angle at 33.9°.

1. Pull out 33.9° bevel detent pin, then rotate pin 1/4 turn to keep out.

2. Bevel range selector knob setting limits movement.

2. Change the position of the bevel range selector knob (Fig. 23 on page 25, 33).

Blade hits table.

Misalignment.

Authorized service.

Angle of cut not accurate.

Angle stops at 0° or 45° need adjustment.

See “Adjustments” on page 22.

Cannot rotate table to change miter angle.

1. Miter lock knob is tightened.
2. Miter detent lever is engaged with a detent (slot) in detent plate.
3. Sawdust accumulation.

1. Turn miter lock knob counterclockwise to loosen.
2. Disengage detent system from detent slot. See “Miter Detent Override” on page 36.

3. Vacuum or blow out dust around turntable. Wear eye protection.

Head assembly will not fully raise or blade guard will not fully close.

1. Head assembly lock pin is engaged.
2. Sawdust accumulation.
3. Sawdust accumulation.

1. Pull out the head assembly lock pin, allowing head assembly to go up. See “To Disengage the Head Assembly Lock Pin” on page 22.

2. Clean head assembly.

3. Authorized service.

Blade binds, jams, burns wood.
Rough cuts.

4. Improper operation. 1. Dull blade. 2. Improper blade. 3. Bent blade.

1. See “Saw Operations” starting on page 35.
2. Replace or sharpen blade.
3. Replace with 12″ (305mm) diameter blade designed for material being cut.

4. Replace blade.

Head assembly slides for-

Slide rail lock knob has

ward and back when making been loosened.

a chop cut.

Tighten the slide rail lock knob (Fig. 40 on page 35, 7) by turning it clockwise.

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Troubleshooting

PROBLEM

CAUSE

CORRECTIVE ACTION

Tool vibrates or shakes.
Head assembly does not slide freely when attempting a slide cut. Blade does not cut completely through workpiece. Saw blade or lower guard cuts or contacts sliding fence when saw is set for bevel cuts.

1. Saw blade not round. 2. Saw blade damaged. 3. Saw blade loose. 4. Other.
The slide rail lock knob has been tightened.
Replacement blade is less than 12″ (305mm) diameter. Sliding fence is not moved out from path of saw blade before making bevel cut.

1. Replace blade.
2. Replace blade.
3. Check that blade is properly seated on the inner washer. See “Removing and Installing Blades” on page 19.
4. Authorized service.
Loosen the slide rail lock knob (Fig. 40 on page 35, 7) by turning it counterclockwise.
Change to a blade that is fully 12″ (305mm) diameter.
Move sliding fence to be clear of lower guard and saw blade. Then perform a “dry run” to check for clearances before making bevel cuts. See “Dry Run” on page 31.

Attachments and Accessories

GAM 220 MF and GAM 270 MFL Digital Angle Finder/Compound Cut Calculator/Protractor/ Level Gives you the information needed to position cuts so that they fit together precisely even if the room is out of square.
MS1233 Crown Stop Set Correctly hold crown molding in an inclined position against fence. Set molding for simple vertical cutting no compound cutting required.

T1B Portable Miter Saw Stand
GTA3800 Portable Miter Saw Stand with Wheels
T4B Gravity-Rise Wheeled Miter Saw Stand

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Symboles relatifs à la sécurité

Les définitions ci-dessous décrivent le niveau de gravité pour chaque terme signalant un danger. Veuillez lire le mode d’emploi et lire la signification de ces symboles.

C’est le symbole d’alerte relatif à la sécurité. Il est utilisé pour vous avertir de l’existence

possible d’un danger de lésion corporelle. Obéissez à tous les messages relatifs à la

sécurité qui suivent ce symbole pour éviter tout risque de blessure ou même de mort.

DANGER indique une situation dangereuse qui, si elle n’est pas évitée, causera la mort d’une personne ou une blessure grave.
AVERTISSEMENT indique une situation dangereuse qui, si elle n’est pas évitée, causera la mort d’une personne ou une blessure grave.
MISE EN GARDE indique une situation dangereuse qui, si elle n’est pas évitée, causera une blessure légère ou modérée.

Table de matières

Symboles relatifs à la sécurité . . . . . . . . . . . . . . . . . . . 57 Avertissements généraux relatifs à la sécurité
pour les outils électriques. . . . . . . . . . . . . . . . . . . 58 Consignes de sécurité pour les scies à onglet . . . . . . . 60 Consignes de sécurité additionnelles . . . . . . . . . . . . . 62 Symboles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Familiarisez-vous avec votre scie à onglet . . . . . . . . . . 65 Spécifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Utilisation prévue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Coupe de maçonnerie/métal . . . . . . . . . . . . . . . . 69 Capacités de coupe. . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Déballage et inspection du contenu. . . . . . . . . . . . . . . 71
Déballage de la scie à onglet . . . . . . . . . . . . . . . . . 71 Vérification du contenu de l’emballage . . . . . . . . 71 Outils nécessaires pour l’assemblage . . . . . . . . . . . . . 72 Vérification des pièces . . . . . . . . . . . . . . . . . . . . . 72 Vérification de l’exactitude de l’équerre
combinée . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Assemblage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Rangement de la clé Torx . . . . . . . . . . . . . . . . . . . 73 Fixation des rallonges de la base . . . . . . . . . . . . . 73 Insertion et retrait du bloc-piles . . . . . . . . . . . . . . 74 Retrait et l’installation des lames . . . . . . . . . . . . . 74

Assemblage du système de dépoussiérage . . . . . 76 Réglages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Utilisation de la broche de verrouillage de l’ensemble de tête . . . . . . . . . . . . . . . . . . . . . 77
Système de crans d’onglet Procédure de réglage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Butée de biseau à 0° . . . . . . . . . . . . . . . . . . . . . . . 79 Butée de biseau à 45° . . . . . . . . . . . . . . . . . . . . . . 80 Transport et montage . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Soulèvement de la scie . . . . . . . . . . . . . . . . . . . . . 82 Applications de montage . . . . . . . . . . . . . . . . . . . 83 Préparation en vue des opérations de la scie . . . . . . . 84 Activation par un interrupteur. . . . . . . . . . . . . . . . 84 Éclairage à DEL incorporé. . . . . . . . . . . . . . . . . . . 84 Position du corps et des mains . . . . . . . . . . . . . . . 84 Support de l’ouvrage . . . . . . . . . . . . . . . . . . . . . . . 87 Opérations de la scie . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Fonctionnement des freins . . . . . . . . . . . . . . . . . . 90 Verrou de coupe/couronne . . . . . . . . . . . . . . . . . . 90 Utilisation du bouton de verrouillage de
l’onglet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Utilisation du système de crans d’onglet . . . . . . . 91 Neutralisation des crans d’onglet . . . . . . . . . . . . . 91

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Table de matières

Coupes de tronçonnage . . . . . . . . . . . . . . . . . . . . 92 Coupes coulissantes . . . . . . . . . . . . . . . . . . . . . . . 93 Coupe d’onglets. . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Coupes en biseau . . . . . . . . . . . . . . . . . . . . . . . . . 96 Butée 2x@45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Coupes composées . . . . . . . . . . . . . . . . . . . . . . . . 98 Coupe de plinthes . . . . . . . . . . . . . . . . . . . . . . . . . 99 Coupe de moulure couronnée. . . . . . . . . . . . . . . 100 Coupes spéciales. . . . . . . . . . . . . . . . . . . . . . . . . 106 Maintenance et lubrification. . . . . . . . . . . . . . . . . . . . 108 Service après-vente. . . . . . . . . . . . . . . . . . . . . . . 108

Piles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Entretien des lames. . . . . . . . . . . . . . . . . . . . . . . 108 Lubrification de l’outil . . . . . . . . . . . . . . . . . . . . . 108 Paliers et roulements. . . . . . . . . . . . . . . . . . . . . . 108 Nettoyage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Recherche de la cause des problèmes. . . . . . . . . . . . 109 Guide de dépannage – Électricité . . . . . . . . . . . . 109 Guide de dépannage – Généralités . . . . . . . . . . . 110 Attachements / Accessoires. . . . . . . . . . . . . . . . . . . . 111

Avertissements généraux relatifs à la sécurité pour les outils électriques

Lisez toutes les consignes de sécurité, instructions, illustrations et spécifications fournies avec cet outil électrique. Le non-respect de toutes les instructions figurant ci-après pourrait causer un choc électrique, un incendie et/ou des blessures graves.

CONSERVEZ TOUS LES AVERTISSEMENTS ET TOUTES LES INSTRUCTIONS POUR RÉFÉRENCE FUTURE.

Le terme « outil électrique » dans les avertissements fait référence à votre outil électrique à cordon d’alimentation élec-

trique branché dans une prise secteur ou à votre outil électrique à piles (sans fil).

1. Sécurité de la zone de travail

courant correspondant naturellement aux fiches réduira le risque de choc électrique.

a. Gardez votre zone de travail propre et bien éclairée. Des zones encombrées ou sombres sont propices aux accidents.
b. N’utilisez pas des outils électriques dans une atmosphère explosive, par exemple en présence de liquides, de gaz ou de poussières inflammables. Les outils électriques produisent des étincelles qui risquent de mettre feu aux poussières ou émanations de fumée.

b. Évitez tout contact de votre corps avec des surfaces mises à la terre ou à la masse telles que des surfaces de tuyaux, de radiateurs, de cuisinières et de réfrigérateurs. Il existe un risque accru de choc électrique si votre corps est en contact avec la terre ou la masse.
c. N’exposez pas d’outils électriques à la pluie ou à un environnement humide. La pénétration d’eau dans un outil électrique augmentera le risque de choc électrique.

c. Gardez les enfants et les autres personnes présentes à une distance suffisante lorsque vous utilisez un outil électrique. Des distractions risqueraient de vous faire perdre le contrôle.
2. Sécurité électrique

d. N’utilisez pas le cordon de façon abusive. N’utilisez pas le cordon pour porter, tirer ou débrancher l’outil électrique. Tenez le cordon à distance de toute source de chaleur, d’huile, de bords tranchants ou de pièces mobiles. Des cordons endommagés ou entortillés augmentent le risque de choc électrique.

a. La fiche de l’outil électrique doit correspondre à la prise de courant. Ne modifiez jamais une fiche de quelque façon que ce soit. N’utilisez pas d’adaptateurs de fiches avec des outils électriques mis à la terre/à la masse. L’emploi de fiches non modifiées et de prises de

e. Lorsque vous utilisez un outil électrique à l’extérieur, employez un cordon de rallonge approprié pour un emploi à l’extérieur. L’utilisation d’un cordon approprié pour une utilisation à l’extérieur réduit le risque de choc
électrique.

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Avertissements généraux relatifs à la sécurité pour les outils électriques

f. Si l’utilisation d’un outil électrique dans un endroit humide est inévitable, utilisez une alimentation protégée par un disjoncteur de fuite à la terre. L’utilisation d’un tel circuit réduit le risque de choc électrique.
3. Sécurité personnelle
a. Faites preuve de vigilance et de bon sens, et observez attentivement ce que vous faites lorsque vous utilisez un outil électrique. N’utilisez pas un outil électrique si vous êtes fatigué(e) ou sous l’influence de drogues, d’alcool ou de médicaments. Un simple moment d’inattention pendant que vous utilisez un outil électrique pourrait causer une blessure grave.
b. Utilisez des équipements de protection individuelle. Portez toujours des équipements de protection des yeux. Des équipements de protection tels qu’un masque de protection contre la poussière, des chaussures de sécurité antidérapantes, un casque ou un dispositif de protection de l’ouïe utilisés en fonction des conditions réduiront le nombre des blessures.
c. Prévenez tout risque de mise en marche accidentelle. Assurez-vous que l’interrupteur est dans la position d’arrêt (OFF) avant de connecter l’appareil à une source d’alimentation et/ou à un bloc-piles, de le soulever ou de le transporter. Le fait de transporter des outils électriques avec le doigt sur l’interrupteur ou de mettre sous tension des outils électriques avec l’interrupteur en position de marche invite les accidents.
d. Retirez toute clé de réglage pouvant être attachée à l’outil avant de mettre l’outil électrique sous tension. Une clé laissée attachée à une pièce en rotation de l’outil électrique pourrait causer une blessure.
e. Ne vous penchez pas excessivement au-dessus de l’outil. Veillez à toujours garder un bon équilibre et un appui stable. Ceci permet de mieux contrôler l’outil électrique dans des situations inattendues.
f. Portez des vêtements appropriés. Ne portez pas de bijoux ou de vêtements amples. Gardez vos cheveux et vos vêtements à une distance suffisante des pièces mobiles. Les vêtements amples, bijoux ou cheveux longs pourraient être attrapés par des pièces mobiles.
g. Si des dispositifs sont fournis pour le raccordement d’accessoires d’extraction et de collecte de la poussière, assurez-vous qu’ils sont connectés et utilisés de façon appropriée. L’emploi correct des accessoires de collecte de la poussière peut réduire les dangers associés à la poussière.
h. Ne laissez pas la familiarité résultant de l’utilisation fréquente des outils vous inciter à devenir

complaisant(e) et à ignorer les principes de sécurité relatifs aux outils. Une action négligente pourrait causer des blessures graves en une fraction de seconde.
4. Utilisation et entretien de l’outil électrique
a. N’imposez pas de contraintes excessives à l’outil électrique. Utilisez l’outil électrique approprié pour votre application. L’outil électrique correct fera le travail plus efficacement et avec plus de sécurité à la vitesse à laquelle il a été conçu pour fonctionner.
b. N’utilisez pas l’outil électrique si l’interrupteur de marche/arrêt ne permet pas de le mettre sous tension/hors tension. Tout outil électrique qui ne peut pas être contrôlé par son interrupteur est dangereux et doit être réparé.
c. Débranchez la fiche de la source d’alimentation électrique et/ou retirez le bloc-piles de l’outil électrique (s’il est amovible) avant d’y apporter de quelconques modifications, de changer d’accessoire ou de ranger l’outil électrique. De telles mesures de sécurité préventives réduisent le risque de déclenchement accidentel de l’outil électrique.
d. Rangez les outils électriques qui ne sont pas utilisés activement hors de portée des enfants, et ne laissez aucune personne n’ayant pas lu ces instructions et ne sachant pas comment utiliser un tel outil électrique se servir de cet outil. Les outils électriques sont dangereux quand ils sont entre les mains d’utilisateurs n’ayant pas reçu la formation nécessaire à leur utilisation.
e. Entretenez de façon appropriée les outils électriques et les accessoires. Assurez-vous que les pièces en mouvement sont bien alignées et qu’elles ne se coincent pas, qu’il n’y a pas de pièces cassées ou qu’il n’existe aucune situation pouvant affecter le fonctionnement de l’outil électrique. Si l’outil électrique est endommagé, faites-le réparer avant de vous en servir à nouveau. De nombreux accidents sont causés par des outils électriques mal entretenus.
f. Gardez les outils de coupe tranchants et propres. Des outils de coupe entretenus de façon adéquate avec des bords de coupe tranchants sont moins susceptibles de se coincer et sont plus faciles à contrôler.
g. Utilisez l’outil électrique, les accessoires, les embouts de l’outil, etc. conformément à ces instructions, en tenant compte des conditions de travail et de la tâche à accomplir. L’utilisation de l’outil électrique pour des opérations différentes de celles pour lesquelles il est conçu pourrait causer une situation dangereuse.

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Avertissements généraux relatifs à la sécurité pour les outils électriques

h. Gardez les poignées et les surfaces de préhension propres, sèches et exemptes de toute trace d’huile ou de graisse. Les poignées et les surfaces de préhension glissantes ne permettent pas une manipulation et un contrôle sûrs de l’outil dans des situations inattendues.
5. Utilisation et entretien de l’outil électrique à pile
a. Ne rechargez l’outil qu’avec le chargeur indiqué par le fabricant. Un chargeur qui est approprié pour un type de bloc-piles pourrait créer un risque d’incendie quand il est utilisé avec un autre bloc-piles.
b. Utilisez votre outil exclusivement avec des blocspiles conçus spécifiquement pour celui-ci. L’emploi de tout autre bloc-piles risquerait de causer des blessures et un incendie.
c. Lorsque le bloc-piles n’est pas utilisé, gardez-le à une distance suffisante des autres objets en métal, comme des trombones, pièces de monnaie, clés, clous, vis ou autres petits objets en métal qui pourraient faire une connexion entre une borne et une autre. Le court-circuitage des bornes d’une pile pourrait causer des brûlures ou un incendie.
d. Dans des conditions d’utilisation abusives, du liquide pourrait être éjecté de la pile, évitez tout contact avec celui-ci. En cas de contact accidentel, lavez avec de l’eau. En cas de contact de liquide avec les yeux, consultez un professionnel de santé. Tout liquide éjecté d’une pile peut causer de l’irritation ou des brûlures.

e. N’utilisezpasunbloc-pilesouunoutilquiestendommagé ou a été modifié. Des piles endommagées ou modifiées peuvent se comporter de façon imprévisible et causer un incendie ou une explosion, ou entraîner des blessures.
f. N’exposez pas un bloc-piles ou un outil à un incendie ou à une température excessive. L’exposition à un incendie ou à une température supérieure à 130° C / 265° F pourrait causer une explosion.
g. Suivez toutes les instructions relatives à la charge et ne chargez pas le bloc-piles ou l’outil en dehors de la plage de température indiquée dans les instructions. Une charge dans des conditions appropriées ou à des températures en dehors de la plage spécifiée pourrait endommager les piles et augmenter le risque d’incendie.
6. Service après-vente
a. Faites entretenir votre outil électrique par un réparateur compétent n’utilisant que des pièces de rechange identiques. Ceci assurera le maintien de la sécurité de l’outil électrique.
b. Ne tentez jamais de réparer des blocs-piles endommagés. La réparation de blocs-piles ne doit être effectuée que par le fabricant ou un prestataire de services agréé.

Consignes de sécurité pour les scies à onglet

a. Les scies à onglet sont conçues pour couper le bois ou des produits similaires au bois; elles ne peuvent pas être utilisées avec des meules de tronçonnage abrasives pour couper des matériaux ferreux tels que des barres, des tiges, des goujons, etc. De la poussière abrasive causerait le blocage de pièces mobiles telles que le dispositif de protection inférieur. Les étincelles causées par la coupe de matériaux abrasifs brûleront le dispositif de protection inférieur, la plaque amovible à entailler et d’autres pièces en plastique.
b. Utilisez des brides de fixation pour supporter l’ouvrage dans la mesure du possible. Si vous soutenez l’ouvrage à la main, vous devez toujours garder votre main à au moins 10 cm / 4 po de chaque côté de la lame de la scie. N’utilisez pas cette scie pour couper des pièces qui sont trop petites pour être assujetties au moyen de brides de fixation ou tenues à la main en toute sécurité. Si vous placez votre main trop près de la lame

de la scie, vous augmentez les risques de vous blesser en cas de contact avec la lame.
c. L’ouvrage doit être stationnaire et assujetti au moyen de brides de fixation ou maintenu contre le guide et la table. Ne poussez pas l’ouvrage à la main en direction de la lame et ne coupez pas « à main levée » de quelque façon que ce soit. Des pièces non retenues ou en mouvement pourraient être projetées à grande vitesse et causer des blessures.
d. Poussez la scie à travers l’ouvrage. Ne tirez pas la scie à travers l’ouvrage. Pour faire une coupe, soulevez la tête de la scie et tirez-la pour la faire sortir de l’ouvrage sans couper, faites démarrer le moteur, appuyez sur la tête de la scie et poussez la scie à travers l’ouvrage. Le fait de couper pendant la partie de l’opération consistant à tirer risque de faire grimper la lame de la scie sur le dessus de l’ouvrage et de projeter violemment l’ensemble de lame vers l’opérateur.

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Consignes de sécurité pour les scies à onglet

e. Ne croisez jamais votre main sur la ligne de coupe prévue, soit devant, soit derrière la lame de la scie. Il est très dangereux de soutenir la pièce à « mains croisées », c’est-à-dire de tenir l’ouvrage à droite de la lame de scie avec votre main gauche ou vice-versa.
f. Ne tendez pas la main pour atteindre l’arrière du guide à moins de 10 cm / 4 po de chaque côté de la lame de la scie, pour retirer des débris de bois ou pour toute autre raison pendant que la lame tourne. La proximité de la lame de scie en train de tourner et votre main n’est pas toujours évidente, et vous pourriez subir une blessure grave.
g. Inspectez votre ouvrage avant de commencer à couper. Si l’ouvrage est tordu ou courbé, assujettissezle de manière que la partie extérieure de la courbure soit face au guide. Assurez-vous toujours qu’il n’y a pas d’espace entre l’ouvrage, le guide et la table le long de la ligne de coupe. Les ouvrages courbés ou tordus peuvent subir une torsion supplémentaire ou bouger, ce qui risquerait d’avoir pour effet que la lame de la scie en train de tourner se coince pendant la coupe. Il ne doit pas y avoir de clous ou de corps étrangers dans l’ouvrage.
h. N’utilisez pas la scie jusqu’à ce que tous les outils, débris en bois, etc., aient été retirés de la table de travail, et qu’il ne reste plus que l’ouvrage. De petits déchets ou des morceaux de bois non sécurisés, ou d’autres objets qui pourraient entrer en contact avec la lame en train de tourner, risqueraient d’être projetés à grande vitesse.
i. Ne coupez qu’un ouvrage à la fois. Il n’est pas possible d’assujettir par des brides de fixation ou de sécuriser par ailleurs de multiples ouvrages à la fois de façon adéquate, et ils risqueraient de se coincer sur la lame ou de changer de position pendant la coupe.
j. Vérifiez que la scie à onglet est montée ou placée sur une surface de travail ferme et de niveau avant de commencer à utiliser la scie. Une surface de travail ferme et de niveau réduit le risque de rendre la scie à onglet instable.
k. Planifiez votre travail. Chaque fois que vous modifiez le réglage de l’angle du biseau ou de l’onglet, assurez-vous que le guide réglable est correctement réglé pour supporter l’ouvrage et qu’il n’interfère pas avec la lame ou le système de protection. Sans mettre l’outil sous tension (« ON ») et sans ouvrage à usiner sur la table, déplacez la lame de scie à travers une coupe simulée complète pour vous assurer qu’il n’y aura pas d’interférence ou de risque de couper le guide.
l. Prévoyez un support adéquat tel que des rallonges de table, des chevalets de sciage, etc. si votre ouvrage est plus large ou plus long que le dessus de la table. Les ouvrages plus longs ou plus larges que la table de la scie

à onglet risquent de basculer s’ils ne sont pas solidement supportés. Si l’ouvrage ou la partie coupée de l’ouvrage bascule, ceci risque de soulever le dispositif de protection de protection inférieur, ou l’ouvrage peut être projeté par la lame en train de tourner.
m. Ne demandez pas à une autre personne de tenir l’ouvrage à la place d’une rallonge de table ou d’un dispositif de support additionnel. Un support instable pour l’ouvrage peut entraîner le coincement de la lame ou le déplacement de l’ouvrage à usiner pendant l’opération de coupe, vous entraînant ainsi que la personne qui vous aide vers la lame en rotation.
n. La partie coupée de l’ouvrage ne doit être coincée ou assujettie d’aucune façon contre la lame de scie en train de tourner. Si elle est confinée, par exemple en conséquence de l’utilisation de butées de longueur, la pièce coupée pourrait être coincée contre la lame et projetée violemment.
o. Utilisez toujours une bride de fixation ou un dispositif conçu pour supporter adéquatement des matériaux ronds tels que des tiges ou des tubes. Les tiges ont tendance à rouler pendant la coupe, ce qui fait que la lame « mord » l’ouvrage et l’attire ainsi que votre main dans la lame.
p. Attendez que la lame atteigne sa vitesse maximum avant de la mettre en contact avec l’ouvrage. Ceci réduira le risque de projection de l’ouvrage.
q. Si l’ouvrage ou la lame se coince, éteignez la scie à onglet. Attendez que toutes les pièces mobiles s’arrêtent et débranchez la fiche de la source d’alimentation et/ ou retirez le bloc-piles. Puis efforcez-vous de dégager la pièce coincée. Si vous continuez à scier alors que l’ouvrage est coincé, vous risquez de perdre le contrôle de la scie à onglet ou de l’endommager.
r. Après avoir terminé la coupe, relâchez l’interrupteur, tenez fermement la scie avec la tête en bas et attendez que la lame cesse de tourner avant de retirer la partie de l’ouvrage qui a été découpée. Il est dangereux d’étendre la main près d’une lame en train de tourner.
s. Tenez fermement la poignée lorsque vous effectuez une coupe incomplète ou lorsque vous relâchez l’interrupteur avant que la tête de la scie ne soit en position complètement abaissée. L’action de freinage de la scie peut entraîner une chute brutale de la tête de la scie, ce qui risque de provoquer des blessures.
t. Évitez de causer la surchauffe des pointes de la lame de la scie.

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Consignes de sécurité additionnelles

Les disjoncteurs de fuite à la terre et les dispositifs de protection personnelle comme les gants et les chaussures en caoutchouc d’électricien renforceront votre sécurité personnelle.
N’utilisez pas d’outils conçus pour le courant alternatif uniquement avec une alimentation en courant continu. Même si l’outil semble fonctionner, les composants électriques de l’outil à courant alternatif sont susceptibles de tomber en panne et de présenter un danger pour l’opérateur.
Gardez les poignées propres, sèches et exemptes de toute trace d’huile ou de graisse. Des mains graisseuses ne permettent pas de contrôler un outil électrique en toute sécurité.
Préparez un calendrier d’entretien périodique pour votre outil. Lors du nettoyage d’un outil, veillez à ne pas démonter une partie quelconque de l’outil étant donné que des fils internes pourraient être déplacés ou pincés et que les ressorts du dispositif de protection pourraient être montés de façon incorrecte. Certains produits de nettoyage tels que l’essence, le tétrachlorure de carbone, l’ammoniac, etc. peuvent endommager les pièces en plastique.
Des travaux de ponçage, de sciage, de meulage et de perçage réalisés avec un outil électrique et d’autres travaux de construction peuvent produire des poussières contenant des produits chimiques qui sont des causes reconnues de cancer, de malformation congénitale ou d’autres problèmes reproductifs. Ces produits chimiques sont, par exemple :
· le plomb provenant de peinture au plomb,
· des cristaux de silice provenant des briques et du ciment, ainsi que d’autres produits de maçonnerie, et
· de l’arsenic et du chrome provenant de bois de construction traité par des produits chimiques.

Le niveau de risque causé par de telles expositions varie en fonction de la fréquence de ces types de travaux. Pour réduire l’exposition à ces produits chimiques, il est utile de travailler dans un lieu bien ventilé et de porter un équipement de sécurité approprié tel que certains masques à poussière conçus spécialement pour filtrer les particules microscopiques.

N’utilisez pas la scie à onglet Bosch GCM18V-12SD pour couper des panneaux de fibrociment. La coupe de matériaux contenant de la silice cristalline peut créer des ex-
positions à de la poussière de silice respirable.

Lisez attentivement tous les avertissements figurant sur votre scie à onglet avant de vous en servir à chaque fois.

AVERTISSEMENT

Pendant leur fonctionnement, les outils

électriques peuvent pro-

jeter des corps étrangers

dans les yeux de leur util-

Portez toujours des équipements isateur et lui infliger de

de protection des yeux.

graves blessures aux

yeux. Portez toujours des

lunettes de sécurité répondant à la norme ANSI Z87.1 (tel

qu’indiqué sur l’emballage) avant de commencer à utiliser un

outil électrique.

N’utilisez pas cette scie à onglet sans que les rallonges de la base aient été correctement installées. L’absence d’un support d’ouvrage approprié peut entraîner des bles-
sures corporelles.

ZONES DE RISQUE DE CHOC EN RETOUR Évitez d’y placer les mains, les doigts ou les bras.

Do not carry the saw by this handle. Ne portez pas la scie par cette poignée. No transporte la sierra por este mango.
ZONE DÉSIGNÉE D’INTERDICTION DE PRÉHENSION POUR LE TRANSPORT
Une zone dangereuse ne soulevez ou ne transportez jamais la scie par la poignée de l’interrupteur
d’alimentation secteur.

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Symboles

Important : Certains des symboles suivants peuvent être utilisés sur votre outil. Veuillez les étudier et apprendre leur signification. L’interprétation correcte de ces symboles vous aidera à mieux utiliser votre outil et à vous en servir plus efficacement et en toute sécurité.

Symbole V A Hz W kg
min s
CFM n0 n

Désignation / Explication Volts (tension) Ampères (courant) Hertz (fréquence, cycles par seconde) Watts (puissance) Kilogrammes (poids) Minutes (temps) Secondes (temps) Pieds cubes par minute [ou pi3 / min] (débit d’air) Diamètre (taille des mèches, des meules, etc.) Vitesse à vide (vitesse de rotation à vide) Vitesse nominale (vitesse maximum possible)

…/min

Révolutions ou mouvements alternatifs par minute (révolutions, coups, vitesse de surface, orbites, etc. par minute)

Position d’arrêt (vitesse nulle, couple nul…)

1, 2, 3, … Réglages du sélecteur (réglages de vitesse, de couple ou de position. Un chiffre plus élevé signifie une I, II, III, plus grande vitesse)

Sélecteur infiniment variable avec arrêt (la vitesse augmente à partir du réglage 0) Flèche (action dans le sens de la flèche) Courant alternatif (type ou caractéristique du courant) Courant continu (type ou caractéristique du courant) Courant alternatif ou continu (type ou caractéristique du courant) Construction de classe II (désigne des outils de construction à double isolation) Borne de mise à la terre (borne de mise à la masse)

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Symboles

Symbole

Désignation / Explication

Désigne un programme de recyclage des batteries Li-ion

Alerte l’utilisateur pour qu’il lise le mode d’emploi

Alerte l’utilisateur pour lui demander de porter un dispositif de protection des yeux.

Ce symbole indique que ce composant est reconnu par Underwriters Laboratories.
Ce symbole indique que ce composant est reconnu par Underwriters Laboratories, et qu’il est conforme aux normes des États-Unis et du Canada.
Ce symbole indique que cet outil est répertorié par la Canadian Standards Association.
Ce symbole indique que cet outil est répertorié par la Canadian Standards Association, et qu’il est conforme aux normes des États-Unis et du Canada.
Ce symbole indique que cet outil est homologué par les services d’essais Intertek, et qu’il est conforme aux normes des États-Unis et du Canada.

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Familiarisez-vous avec votre scie à onglet

Scie à onglet sans fil GCM18V-12SD

Fig. 1 1 2 3
7
8 9 10
11 12 13
14 15

6 25

12 15

16
22 13

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Familiarisez-vous avec votre scie à onglet

1 La poignée principale est utilisée pour lever et abaisser l’ensemble de la tête et contient l’interrupteur d’alimentation. Tirez sur la poignée (vers le bas) pour abaisser la lame jusqu’au niveau de l’ouvrage.
2 Boutons de déverrouillage de l’interrupteur (LockOFF) deux boutons, dont l’un doit être enfoncé avant de pouvoir appuyer sur l’interrupteur d’alimentation.
3 L’interrupteur d’alimentation est utilisé avec le bouton « Lock-OFF » pour éteindre et allumer la scie.
4 La poignée de transport principale sert à transporter la scie.
5 Lien avec le dispositif de protection inférieur permettant un mouvement en douceur du dispositif de protection inférieur.
6 Le déversoir à poussière dirige la sciure vers le haut, dans le sac à poussière ou dans le tuyau flexible d’aspiration.
7 Le bouton de verrouillage du rail coulissant, lorsqu’il est serré, verrouille le système de coulissement en place. Serrez en tournant le bouton dans le sens des aiguilles d’une montre (vers la droite), et desserrez en tournant le bouton dans le sens inverse des aiguilles d’une montre (vers la gauche).
8 La broche de verrouillage de l’ensemble de tête est utilisée pour verrouiller l’ensemble de tête ans la position du bas.
9 Le poteau de biseau fournit un support rotatif pour toutes les pièces de la scie à onglet au-dessus de la table.
10 L’échelle de biseaux et les indicateurs indiquent l’angle de biseau actuel. La grande échelle angulaire permet de lire facilement les angles de biseau.
11 Le bouton de sélection de la plage de biseaux est utilisé pour sélectionner la plage de biseaux à gauche : 0° à 47° à gauche ou 0° à 47° à dro

References

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BOSCH GCM18V-12SD 18V 12 In Slide Miter Saw User Manual

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References

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