BOSCH GKT 18V-52 GC Professional Cordless Plunge Saw Instruction Manual

BOSCH GKT 18V-52 GC Professional Cordless Plunge Saw

Product Information

Specifications

• Brand: Bosch Power Tools
• Model: GKT 18V-52 GC Professional
• Country: Germany
• Dimensions: 305mm x 169mm x 140mm
• Weight: 4.1kg (without battery), 5.5kg (with battery)
• Max Blade Thickness: 1.4mm
• Min Blade Thickness: 1.0mm
• Battery Type: GBA 18V, ProCORE18V (5.5 Ah)
• Recommended Charging Temperature : 0°C to +35°C
• Compatible Chargers: GAL 18, GAX 18, GAL 36
• Signal Range : 30m

Product Usage Instructions

Safety Guidelines

• When operating the power tool in a damp environment, use a residual current device to reduce the risk of electric shock.
• Avoid short circuits between the battery contacts to prevent burns or fires.

Service and Maintenance

• Only have your power tool repaired by qualified professionals using original spare parts to ensure the tool’s safety.

Protective Gear

• Wear a dust mask while using the tool.

Battery Usage

• To insert the battery, slide it into the battery slot until it clicks into place.
• The battery charge level is also displayed on the user interface for reference.

Frequently Asked Questions (FAQ)

Q: What should I do if the tool gets wet?

• A: If the tool gets wet, dry it thoroughly before use to prevent any electrical hazards.

Q: How do I know when to replace the blade?

• A: Replace the blade when it becomes dull or damaged to maintain cutting efficiency and safety.

Q: Can I use any brand of battery with this tool?

• A: It is recommended to use Bosch GBA 18V or ProCORE18V batteries for optimal performance and compatibility.

Safety Instructions

General Power Tool Safety Warnings

• WARNING 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.

Work area safety

• Keep the work area clean and well-lit. Cluttered or dark areas invite accidents.
• Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks that may ignite the dust or fumes.
• Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

Electrical safety

• 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 the risk of electric shock.
• 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.
• Do not expose power tools to rain or wet conditions.
• Water entering a power tool will increase the risk of electric shock.
• Do not abuse the cord. Never use the cord for carrying, pulling, or unplugging the power tool. Keep the cord away from heat, oil, sharp edges, or moving parts.
• Damaged or entangled cords increase the risk of electric shock.
• When operating a power tool outdoors, use an extension cord suitable for outdoor use. The use of a cord suitable for outdoor use reduces the risk of electric shock.
• If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. The use of an RCD reduces the risk of electric shock.

Personal safety

• 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.
• Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hats, or hearing protection used for appropriate conditions will reduce personal injuries.
• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a 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.
• 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.
• Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
• 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.
• If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. The use of dust collection can reduce dust-related hazards.
• Do not let familiarity gained from the 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.

Power tool use and care

• 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.

• Do not use the power tool if the switch does not turn on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
  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.

• 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.

• 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.

• Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.

• Use the power tool, accessories tool bits, etc. according to 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.

• 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.

Battery tool use and care

• 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.
• Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
• When the 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.
• Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts the eyes, additionally seek medical help.
• Liquid ejected from the battery may cause irritation or burns.
• Do not use a battery pack or tool that is damaged or modified. Damaged or modified batteries may exhibit unpredictable behavior resulting in fire, explosion, or risk of injury.
• Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 130°C may cause an explosion.
• 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.

Service

• 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.
• Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorized service providers.

Safety instructions for circular saws

Cutting procedures

• DANGER: Keep hands away from the cutting area and the blade. If both hands are holding the saw, they cannot be cut by the blade.
• Do not reach underneath the workpiece. The guard cannot protect you from the blade below the workpiece.
• Adjust the cutting depth to the thickness of the workpiece. Less than a full tooth of the blade teeth should be visible below the workpiece.
• Never hold the workpiece in your hands or across your leg while cutting. Secure the workpiece to a stable platform. It is important to support the work properly to minimize body exposure, blade binding, or loss of control.
• Hold the power tool by insulated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring.
• Contact with a “live” wire will also make exposed metal parts of the power tool “live” and could give the operator an electric shock.
• When ripping always use a rip fence or straight edge guide. This improves the accuracy of the cut and reduces the chance of blade binding.
• Always use blades with the correct size and shape (diamond versus round) of arbor holes. Blades that do not match the mounting hardware of the saw will run off center, causing a loss of control.
• Never use damaged or incorrect blade washers or bolts. The blade washers and bolts were specially designed for your saw, for optimum performance and safety of operation.

Kickback causes and related warnings

• kickback is a sudden reaction to a pinched, jammed, or misaligned saw blade, causing an uncontrolled saw to lift up and out of the workpiece toward the operator;
• when the blade is pinched or jammed tightly by the kerf closing down, the blade stalls, and the motor reaction drives the unit rapidly back toward the operator;
• if the blade becomes twisted or misaligned in the cut, the teeth at the back edge of the blade can dig into the top surface of the wood causing the blade to climb out of the kerf and jump back toward the operator.
• Kickback is the result of saw misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below.
• Maintain a firm grip on the saw and position your arms to resist kickback forces. Position your body to either side of the blade, but not in line with the blade.
• Kickback could cause the saw to jump backward, but kickback forces can be controlled by the operator if proper precautions are taken.
• When the blade is binding, or when interrupting a cut for any reason, release the trigger and hold the saw motionless in the material until the blade comes to a complete stop.
• Never attempt to remove the saw from the work or pull the saw backward while the blade is in motion or kickback may occur. Investigate and take corrective actions to eliminate the cause of blade binding.
• When restarting a saw in the workpiece, center the saw blade in the kerf so that the saw teeth are not engaged in the material. If a saw blade binds, it may walk up or kick back from the workpiece as the saw is restarted.
• Support large panels to minimize the risk of blade pinching and kickback. Large panels tend to sag under their weight. Supports must be placed under the panel on both sides, near the line of cut and the edge of the panel.
• Do not use dull or damaged blades. Unsharpened or improperly set blades produce narrow kerf causing excessive friction, blade binding, and kickback.
• Blade depth and bevel-adjusting locking levers must be tight and secure before cutting. If blade adjustment shifts while cutting, it may cause binding and kickback.
• Use extra caution when sawing into existing walls or other blind areas. The protruding blade may cut objects that can cause kickback.

Guard function

• Check the guard for proper closing before each use.
• Do not operate the saw if the guard does not move freely and enclose the blade instantly. Never clamp or tie the guard so that the blade is exposed.
• If the saw is accidentally dropped, the guard may be bent.
• Check to make sure that the guard moves freely and does not touch the blade or any other part, in all angles and depths of cut.
• Check the operation and condition of the guard return spring. If the guard and the spring are not operating properly, they must be serviced before use.
• The guard may operate sluggishly due to damaged parts, gummy deposits, or a build-up of debris.
• Assure that the base plate of the saw will not shift while performing a “plunge cut”. Blade shifting sideways will cause binding and likely kickback.
• Always observe that the guard is covering the blade before placing the saw down on a bench or floor. An unprotected, coasting blade will cause the saw to walk backward, cutting whatever is in its path.
• Be aware of the time it takes for the blade to stop after the switch is released.

Additional safety warnings

• Do not allow the chip ejector to come into contact with your hands. You may be injured by rotating parts.
• Do not use the saw above the level of your head. Doing so will mean you have inadequate control of the power tool.
• Use suitable detectors to determine if there are hidden supply lines or contact the local utility company for assistance.
• Contact with electric cables can cause fire and electric shock. Damaging gas lines can lead to explosions. Breaking water pipes causes property damage.
• Secure the workpiece. A workpiece clamped with clamping devices or in a vice is held more securely than by hand.
• Hold the power tool firmly with both hands and make sure you have a stable footing. The power tool can be more securely guided with both hands.
• Do not operate the power tool when stationary. It is not suitable for operation with a saw table.
• Do not use HSS saw blades. Such saw blades can easily break.
• Do not see any ferrous metals. Hot chips may ignite the dust extractor.
• Wear a dust mask.
• In case of damage and improper use of the battery, vapors may be emitted. The battery can set alight or explode.
• Ensure the area is well-ventilated and seek medical attention should you experience any adverse effects. The vapors may irritate the respiratory system.
• Do not open the battery. There is a risk of short-circuiting.
• The battery can be damaged by pointed objects such as nails or screwdrivers or by force applied externally.
• An internal short circuit may occur, causing the battery to burn, smoke, explode, or overheat.
• Only use the battery with products from the manufacturer.
• This is the only way in which you can protect the battery against dangerous overload.
• Protect the battery against heat, e.g. continuous intense sunlight, fire, dirt, water, and moisture. There is a risk of explosion and short-circuiting.
• Always wait until the power tool has come to a complete stop before placing it down. The application tool can jam and cause you to lose control of the power tool.
• Caution! When using the power tool with Bluetooth®, a fault may occur in other devices and systems, airplanes, and medical devices (e.g. pacemakers, and hearing aids).
• Also, damage to people and animals in the immediate vicinity cannot be completely excluded.
• Do not use the power tool with Bluetooth® in the vicinity of medical devices, petrol stations, chemical plants, areas with a potentially explosive atmosphere, or in blasting areas.
• Do not use the power tool with Bluetooth® in aircraft. Avoid using the product near your body for extended periods.
• The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Robert Bosch Power Tools GmbH is under license.

Product Description and Specifications

• Read all the safety and general instructions.
• Failure to observe the safety and general instructions may result in electric shock, fire, and/or serious injury.
• Please observe the illustrations at the beginning of this operating manual.

Intended use

• The power tool is intended for making straight cuts in wood with and against the grain and miter cuts in wood while resting firmly against the workpiece. With the respective saw blades, light building materials, and plastics can also be sawn.
• The power tool must not be used to cut ferrous metals.
• With the Bluetooth® Low Energy Module GCY 42 inserted, power tool data and settings can be transferred between the power tool and a mobile device using Bluetooth® wireless technology.

Product Features

The numbering of the product features refers to the diagram of the power tool on the graphics page.

1. On/off switch
2. Lock-off button for on/off switch
3. Lever for saw blade change
4. Auxiliary handle (insulated gripping surface)
5. Cover for GCY 42 Bluetooth® Low Energy Module
6. Bluetooth® Low Energy Module GCY 42
7. Cutting depth indicator
8. Base plate
9. Hex key
10. Cutting depth scale
11. Scale for miter/bevel angles
12. Parallel guide attachment, front
13. Wing bolt for miter/bevel angle preselection, front
14. Button for miter/bevel angle 47° and -1°
15.  Protective guard
16. Wing bolt for miter/bevel angle preselection, rear
17. Parallel guide attachment, rear
18.  Chip ejector
19.  Handle (insulated gripping surface)
20.  User interface
21. Battery)
22.  Battery release button)
23. Clamping bolt
24. Clamping flange
25. Circular saw blade
26. Mounting flange
27. Saw spindle
28. Spindle lock button
29. Pair of screw clamps)
30. Guide Raila)
31. Connector)
32. 45° cut mark
33. 0° cut mark
34. Extraction Hosea)
35. Plunge markings (4x)
36. Slider for preselecting the cutting depth
37. Battery charge indicator (user interface)
38. ECO mode indicator (user interface)
39. Speed preselection button (user interface)
40. Speed setting/mode indicator (user interface)
41. Smartphone indicator (user interface)
42. Power tool status indicator (user interface)
43. Temperature indicator (user interface)
44. Plastic insert for base plate
45. Slider for guide groove clearance setting (2x)
46. Parallel guided)
47. Wing bolt for parallel guide (2x)a)
48. Screw for fine adjustment 0° miter/bevel cut
49. Screw for fine adjustment 45° miter/bevel cut
50. Groove for Bosch guide raila)
51. Dust/chip bag

a) Accessories shown or described are not included with the product as standard. You can find the complete selection of accessories in our accessories range.

Technical data

• A) Measured at 20–25 °C with rechargeable battery ProCORE18V 8.0Ah
• B) Depends on the battery in use
• C) Limited performance at temperatures < 0 °C
• D) The mobile devices must be compatible with Bluetooth® Low Energy devices (version 4.2) and support the Generic Access Profile (GAP).
• E) The signal range may vary greatly depending on external conditions, including the receiving device used. The Bluetooth® range may be significantly weaker inside closed rooms and through metallic barriers (e.g. walls, shelving units, cases, etc.).
• Values can vary depending on the product, scope of application, and environmental conditions. To find out more, visit www.bosch-professional.com/wac.

Noise/vibration information

• Noise emission values are determined according to EN 62841-2-5.
• Typically, the A-weighted noise level of the power tool is:
• Sound pressure level 96 dB(A); sound power level 107 dB(A). Uncertainty K = 3 dB.

Wear hearing protection!

• Vibration total values ah (triax vector sum) and uncertainty K determined according to EN 62841-2-5:
• Sawing wood: ah < 2.5 m/s2, K = 1.5 m/s2
• The vibration level and noise emission value given in these instructions have been measured under a standardized measuring procedure and may be used to compare power tools.
• They may also be used for a preliminary estimation of vibration and noise emissions.
• The stated vibration level and noise emission value represent the main applications of the power tool.
• However, if the power tool is used for other applications, with different accessories, or is poorly maintained, the vibration level and noise emission value may differ.
• This may significantly increase the vibration and noise emissions over the total working period.
• To estimate vibration and noise emissions accurately, the times when the tool is switched off or when it is running but not being used should also be taken into account.
• This may significantly reduce vibration and noise emissions over the total working period.
• Implement additional safety measures to protect the operator from the effects of vibration, such as servicing the power tool and accessories, keeping their hands warm, and organising workflows correctly.

Rechargeable battery

• Bosch sells some cordless power tools without a rechargeable battery.
• You can tell whether a rechargeable battery is included with the power tool by looking at the packaging.

Charging the battery

• Use only the chargers listed in the technical data. Only these chargers are matched to the lithium-ion battery of your power tool.
• Note: Lithium-ion rechargeable batteries are supplied partially charged according to international transport regulations.
• To ensure full rechargeable battery capacity, fully charge the rechargeable battery before using your tool for the first time.

Inserting the Battery

• Push the charged battery into the battery holder until it clicks into place.

Removing the Battery

• To remove the rechargeable battery, press the battery release button and pull the battery out. Do not use force to do this.
• The rechargeable battery has two locking levels to prevent the battery from falling out if the battery release button is pressed unintentionally.
• The rechargeable battery is held in place by a spring when fitted into the power tool.

Battery charge indicator

• Note: Not all battery types have a battery charge indicator.
• The green LEDs on the battery charge indicator indicate the state of charge of the battery.
• For safety reasons, it is only possible to check the state of charge when the power tool is not in operation.
• Press the button for the battery charge indicator or to show the state of charge. This is also possible when the battery is removed.
• If no LED lights up after pressing the button for the battery charge indicator, then the battery is defective and must be replaced.
• The state of charge of the battery is also displayed on the user interface (see “Status indications.

Battery model GBA 18V

LED Capacity

Battery model ProCORE18V

LED Capacity

Recommendations for Optimal Handling of the Battery

• Protect the battery against moisture and water.
• Only store the battery within a temperature range of −20 to 50 °C. Do not leave the battery in your car in the summer, for example.
• Occasionally clean the ventilation slots on the battery using a soft brush that is clean and dry.
• A significantly reduced operating time after charging indicates that the battery has deteriorated and must be replaced.
• Follow the instructions on correct disposal.

Fitting

• Only use saw blades the maximum permitted speed of which is higher than the no-load speed of the power tool.
• Using the Bluetooth® Low Energy Module GCY 42
• Read the corresponding operating instructions for information about the Bluetooth® Low Energy Module GCY 42.

Inserting/changing the circular saw blade

• Before carrying out any work on the power tool (e.g. maintenance, tool change, etc.), remove the battery from the power tool.
• There is a risk of injury from unintentionally pressing the on/off switch.
• Wear protective gloves when fitting the saw blade.
• The danger of injury when touching the saw blade.
• Do not use abrasive wheels as the application tool under any circumstances.

Selecting the saw blade

• You will find an overview of recommended saw blades at the end of these operating instructions.
• Only use saw blades that match the specifications given in this operating manual and that are tested and marked by EN 847-1

Removing the saw blade (see Figure A)

• Set the maximum cutting depth, (see “Setting the cutting depth (see Figure C).
• To change tools, we recommend that you place the power tool down on the battery side.
• Flip the lever (3) forwards.
• Slide the lock-off switch (2) forward and press the saw into the base plate (8) until this engages in the position for the saw blade change.
• Press and hold the spindle lock button (28).
• Do not press the spindle lock button (28) while the saw spindle is moving. The power tool may become damaged if this happens.
• Use the hex key (9) to undo the clamping bolt (23) in the rotational direction ➋.
• Remove the clamping flange (24) and the saw blade (25) from the saw spindle (27).

Fitting the saw blade (see Figure A)

• Set the maximum cutting depth, (see “Setting the cutting depth (see Figure C)
• To change tools, we recommend that you place the power tool down on the battery side.
• Flip the lever (3) forwards.
• Slide the lock-off switch (2) forward and press the saw into the base plate (8) until this locks into the position for changing the saw blade.
• Clean the saw blade (25) and all the clamping elements to be fitted.
• Place the saw blade (25) on the mounting flange (26).
• The cutting direction of the teeth (the direction of the arrow on the saw blade) must match the rotational direction of the arrow on the protective guard (15).
• Attach the clamping flange (24) and screw in the clamping bolt (23) in the rotational direction ➌. Ensure that the mounting flange (26) and clamping flange (24) are installed in the correct position.
• Press and hold the spindle lock button (28).
• Use the hex key (9) to tighten the clamping bolt (23) in the rotational direction ➌. The tightening torque should be 6–9 Nm, which corresponds to hand-tight plus ¼ turn.
• Flip the lever (3) back. In doing so, the saw will automatically spring back to its home position.

Dust/chip extraction

• The dust from materials such as lead paint, some types of wood, minerals, and metal can be harmful to human health.
• Touching or breathing in this dust can trigger allergic reactions and/or cause respiratory illnesses in the user or people in the near vicinity.
• Certain dust, such as oak or beech dust, are classified as carcinogenic, especially in conjunction with wood treatment additives (chromate, wood preservative).
• Materials containing asbestos may only be machined by specialists.
• Use a dust extraction system that is suitable for the material wherever possible.
• Provide good ventilation at the workplace.
• It is advisable to wear a P2 filter class breathing mask.
• The regulations on the material being machined that apply in the country of use must be observed.
• Avoid dust accumulation at the workplace. Dust can easily ignite.

Chip ejector (see figure I)

• The chip ejector (18) can turn freely.
• An extraction hose with a diameter of 35 mm or a dust/chip bag (51) can be connected to the chip ejector (18).
• To ensure optimum extraction, the chip ejector (18) must be cleaned regularly.

External dust extraction

• Connect an extraction hose with a diameter of 35 mm (34) (accessory) to the chip ejector (18). Connect the extraction hose (34) to a dust extractor (accessory).
• You will find an overview of how to connect various dust extractors at the end of these operating instructions.
• The dust extractor must be suitable for the material being worked.
• When extracting dry dust or dust that is especially detrimental to health or carcinogenic, use a special dust extractor.

Operation

• Before carrying out any work on the power tool (e.g. maintenance, tool change, etc.), remove the battery from the power tool.
• There is a risk of injury from unintentionally pressing the on/off switch.
• Operating modes

Setting the cutting depth (see Figure C)

• Adapt the cutting depth to the thickness of the workpiece.
• A space of less than the height of one full tooth should be visible under the workpiece.
• Push the slider (36) to set the required cutting depth (material thickness + tooth height of the saw blade) on the cutting depth scale (10).
• The cutting depth indicator (7) shows the cutting depth when using a Bosch guide rail.
• When sawing without a guide rail, the cutting depth value increases by the thickness of a Bosch guide rail.

Adjusting the miter/bevel angle

• Place the power tool on a level surface, so that the base plate (8) is fully supported.
• Loosen the wing bolts (13) and (16). Swivel the saw to the side. Set the required miter/bevel angle on the scale (11).
• Retighten the wing bolts (13) and (16). Note: Do not exert any force on the auxiliary handle (4) or the saw itself. If this is not adhered to, different miter/bevel angles can be set unintentionally with the wing bolts (13) and (16).
• This means that the base plate (8) will no longer lay flat on the surface of the FSN guide rail.
• If you tighten both wing bolts at the same time, it may be necessary to support the saw from the bottom of the auxiliary handle (4).
• When doing this, do not exert any force on the auxiliary handle (4) or the saw itself to prevent different settings from being implemented.
• If the settings have nonetheless turned out to be different, loosen both wing bolts (13) and (16) again. Then set the miter/bevel angle again as described previously.
• The saw can be set to a miter/bevel angle of -1° or +47°. To do this, when swiveling, also press the button (14) for a miter/bevel angle of -1° or a miter/bevel angle of +47°.
• Note: When making miter cuts, the cutting depth is less than the value shown on the cutting depth scale (10).
• Note: The maximum miter/bevel angle and the maximum cutting depth are optimized for the use of a Bosch guide rail.
• Note: Using the screws for fine adjustment (48) and (49), you can reset the angle for the miter/bevel cut, e.g. after an impact.
• Cutting without a guide rail: For 45° cuts without a guide rail, the cutting depth should be no more than (10) 40 mm to ensure the angle accuracy and the cutting quality.

Cut marks (see figure B)

• The 0° cut mark (33) indicates the position of the saw blade when making a 0° cut – when used with or without a guide rail.
• The 45° cut mark (32) indicates the position of the saw blade when making a 45° cut – when used without a guide rail.
  Note: The plunge markings (35) indicate where the saw blade plunges into the workpiece when used with a guide rail.

Start-up Switching on/off

• To start the power tool, first press the lock-off switch (2), then press and hold the on/off switch (1).
• Pressing the lock-off switch (2) also unlocks the plunge function and allows the power tool to be pushed down.
• This causes the application tool to plunge into the workpiece.
• Raising the power tool causes it to spring back into the starting position and the plunge function locks again.
• To switch off the power tool, release the on/off switch (1).
• Note: For safety reasons, the on/off switch (1) cannot be locked; it must remain pressed during the entire operation.

Constant electronic control

• The Constant Electronic keeps the speed at no load and under load virtually consistent, guaranteeing uniform performance.

ECO mode

• If the power tool is operated in the energy-saving ECO mode, the battery life may be up to 20% longer.
• If the ECO mode is active, the symbol E is shown on the speed setting/mode indicator (40). In addition, the ECO mode indicator (38) lights up.

User Interface (see Figure D)

• The user interface (20) is used to preselect the speed and to indicate the status of the power tool.

Speed preselection

• Six-speed settings and the ECO mode are preset in the basic settings. Using a special application (Bosch Toolbox app), one to six speed settings can be programmed.
• The information in the table below describes the preset speeds (default settings) for each programmed number of levels.

A) ±25 %

• The required speed depends on the saw blade used and the material being worked on (see the saw blade overview at the end of these operating instructions).
• This will prevent the saw teeth from overheating when sawing.
• You can use the button for speed preselection (39) to preselect the required speed, even during operation.
• The figures in the table below are recommended values for the basic settings with 6 preset speed settings and the ECO mode.

A) ±25 % Status indications

Connectivity functions

• In conjunction with the Bluetooth® Low Energy Module GCY 42, the following connectivity functions are available for the power tool.
• Registration and personalization
• Status check, the output of warning messages
• General information and settings
• Management
• Setting the speed levels
• Read the corresponding operating instructions for information about the Bluetooth® Low Energy Module GCY 42.

Practical advice

• With the Bluetooth® Low Energy Module GCY 42, the power tool is equipped with a radio interface. Local operating restrictions, e.g. in aircraft or hospitals, must be observed.
• In areas in which the Bluetooth® wireless technology must not be used, the Bluetooth® Low Energy Module GCY 42 and the coin cell must be removed.
• Protect saw blades against shock and impact.
• Guide the power tool evenly, pushing it gently in the cutting direction to achieve a high cut quality. Applying too much pressure will significantly reduce the service life of application tools and can damage the power tool.
• The sawing performance and the quality of the cut essentially depend on the condition and the tooth shape of the saw blade. This is why you should only use sharp saw blades that are suitable for the material being machined.

Sawing wood

• Choosing the right saw blade depends on the wood type, wood quality, and whether cuts with or against the grain are required.
• Making cuts in spruce with the grain produces long, spirals-shaped chips.
• Beech and oak dust are especially detrimental to health.
• Therefore, work only with dust extraction.

Sawing Plastic

• Note: Sawing plastic, in particular PVC, produces long, spiral-shaped chips that can be electrostatically charged.
• This can lead to the chip ejector (18) becoming clogged.
• Therefore, you should not work without dust extraction.
• Switch on the power tool and bring it into contact with the workpiece, sawing it carefully. Then continue working quickly and without interruption so that the saw teeth do not become stuck as quickly.
• Sawing lightweight materials (materials containing minerals)
• When sawing lightweight materials, take into account the statutory provisions and recommendations of the material manufacturers.
• Lightweight materials may only be worked on using dry cuts and with a dust extraction system. Always use the guide rail (30) (accessory).
• The dust extractor must be approved for extracting stone dust. Suitable dust extractors are available from Bosch.

Sawing with the guide rail (see Figure B)

• You can use the guide rail (30) to produce straight cuts.
• The rubber lip on the guide rail acts as an anti-splinter guard, which prevents the surface from splintering when sawing wooden materials.
• To fulfill this function, the saw blade must be positioned with its teeth right up against the rubber lip.
• Before making the first cut with the guide rail (30), the rubber lip must be adapted to the circular saw used. To do so, position the guide rail (30) along the entire length of a workpiece.
• Set a cutting depth of approx. 9 mm and a right-angled miter/bevel angle. Switch on the circular saw and guide it evenly, pushing it gently in the cutting direction.
• The connector (31) can be used to join two guide rails. The four screws in the connector are used for clamping.

Fitting the guide rail to the base plate (see Figure E)

• The narrow groove (50) integrated into the base plate (8) can be used for the guide rails shown on the accessories page. Attach the saw to the guide rail and adjust the fitting accuracy of the saw and guide rail as required using the two sliders (45).
• To adjust the base plate to guide rails with a wider guide ring that is made by other suppliers, remove the plastic insert (44).

Sawing with the parallel guide (see figures F–G)

• The parallel guide (46) allows you to make precise cuts along the edge of a workpiece and cut strips with the same dimensions.
• Slide the guide rods on the parallel guide (46) through the guides in the base plate (8). Attach the wing bolts (47) on both sides as shown in the figure, then screw in the wing bolts(47) without fully tightening them.
• Set the required cutting width as the scale value at the respective cut mark (33) or (32) (see “Cut marks (see figure B)”, page 25). Then tighten the wing bolts (47).

Sawing with an auxiliary guide (see Figure H)

• For working on large workpieces or for cutting straight edges, you can securely fasten a board or rail to the workpiece as an auxiliary guide. The circular saw can be guided along the path of this auxiliary guide with the base plate.

Maintenance and Service

Maintenance and cleaning

• To ensure safe and efficient operation, always keep the power tool and the ventilation slots clean.
• The protective guard (15) must always be able to move freely and retract automatically. It is therefore important to keep the area around the protective guard (15) clean at all times. Remove dust and chips with a paintbrush.
• Keep the dust/chip bag, chip ejector, base plate, guide rail, and groove for the guide rail clean at all times.
• Non-coated saw blades can be protected against corrosion using a thin layer of acid-free oil. Remove the oil again before sawing as failure to do so will stain the wood.
• Resin or glue residue on the saw blade has a detrimental effect on the quality of the cut. You should therefore clean saw blades straight after use.

After-Sales Service and Application Service

• Our after-sales service responds to your questions concerning the maintenance and repair of your product as well as spare parts. You can find explosion drawings and information on spare parts at: www.bosch-pt.com
• The Bosch product use advice team will be happy to help you with any questions about our products and their accessories.
• In all correspondence and spare parts orders, please always include the 10‑digit article number given on the nameplate of the product.
• Great Britain
• Robert Bosch Ltd. (B.S.C.)
• P.O. Box 98
• Broadwater Park
• North Orbital Road
• Denham Uxbridge
• UB 9 5HJ
• At www.bosch-pt.co.uk you can order spare parts or arrange the collection of a product in need of servicing or repair.
• Tel. Service: (0344) 7360109
• E-Mail: boschservicecentre@bosch.com
• You can find further service addresses at: www.bosch-pt.com/serviceaddresses

Transport

• The recommended lithium-ion batteries are subject to legislation on the transport of dangerous goods.
• The user can transport the batteries by road without further requirements.
• When the batteries are shipped by third parties (e.g. air transport or forwarding agency), special requirements on packaging and labeling (e.g. ADR regulations) must be met.
• A dangerous goods expert must be consulted when preparing the items for shipping.
• Dispatch battery packs only when the housing is undamaged.
• Tape or mask off open contacts and pack up the battery in such a manner that it cannot move around in the packaging.
• Please also observe the possibility of more detailed national regulations.

Disposal

• Power tools, rechargeable batteries, accessories, and packaging should be sorted for environmentally- friendly recycling.
• Do not dispose of power tools and batteries/rechargeable batteries into household waste!

Only for EU countries:

• According to the Directive 2012/19/EU on waste electrical and electronic equipment and its transposition into national law, power tools that are no longer usable, and, according to Directive 2006/66/EC, defective or drained batteries must be collected separately and disposed of in an environmentally correct manner.
• If disposed of incorrectly, waste electrical and electronic equipment may have harmful effects on the environment and human health, due to the potential presence of hazardous substances.

Only for the United Kingdom:

According to The Waste Electrical and Electronic Equipment Regulations 2013 (SI 2013/3113) (as amended) and the Waste Batteries and Accumulators Regulations 2009 (SI 2009/890) (as amended), products that are no longer usable must be collected separately and disposed of in an environmentally friendly manner.

Battery packs/batteries Li-ion:

• Please observe the notes in the section on transport (see “Transport.

Other Accessories

Expert

Licenses

• Apache 2.0 License Copyright © 2009-2020 Arm Limited. All rights reserved. Version 2.0, January 2004 http://www.apache.org/licenses/
• TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

1. Definitions.
   License” shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. “Licensor” shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. Legal Entity” shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, “control” means (I) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. “You” (or “Your”) shall mean an individual or Legal Entity exercising permissions granted by this License. “Source” form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files. “Object” form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types. “Work” shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below). “Derivative Works” shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof. “Contribution” shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, “submitted” means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as “Not a Contribution.” “Contributor” shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work.

2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form.

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4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions:

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   • You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License.
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   • Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License.

5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions.

6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file.

7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License.

8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages.

9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability.

   • END OF TERMS AND CONDITIONS

• Copyright © 2012–2020 STMicroelectronics

• All rights reserved.

• Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

• Neither the name of STMicroelectronics nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

• THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

• Copyright © 2009–2020 ARM LIMITED

• All rights reserved.

• Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

• Neither the name of ARM nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

• THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Warranty Disclaimer

• This product contains Open Source Software components which underly Open Source Software Licenses.
• Please note that Open Source Licenses contain disclaimer clauses. The text of the Open Source Licenses that apply are included in this manual under “Licenses.

EU Declaration of Conformity

• Plunge circular saw: Article number We declare under our sole responsibility that the stated products comply with all applicable provisions of the directives and regulations listed below and are in conformity with the following standards. Technical file at:

Declaration of Conformity

• Plunge circular saw Article number GKT 18V-52 GC 3 601 FB4 080
• We declare under our sole responsibility that the stated products comply with all applicable provisions of the regulations listed below and are in conformity with the following standards.
• Technical file at: Robert Bosch Ltd. (PT/SOP-GB), Broadwater Park, North Orbital Road, Uxbridge UB9 5HJ, United Kingdom
• Robert Bosch Power Tools GmbH
• 70538 Stuttgart
• GERMANY
• www.bosch-pt.com
• 1 609 92A 984 (2024.03) O / 375

Documents / Resources

| BOSCH GKT 18V-52 GC Professional Cordless Plunge Saw [pdf] Instruction Manual
GKT 18V-52 GC, GKT 18V-52 GC Professional Cordless Plunge Saw, Professional Cordless Plunge Saw, Cordless Plunge Saw, Plunge Saw, Saw
---|---

References

• Invented for life | Bosch Global
• The domain name bosch.mk is for sale
• Početna strana | Bosch u Srbiji
• 巧米网为您服务！(QiaoMi.com)
• Licenses
• Електроінструменти Bosch | Bosch Professional
• bosch-professional.com/wac
• Электроинструменты Bosch | Bosch Professional
• Bosch Power Tools | Bosch Power Tools
• Location selection | Bosch Power Tools
• Service worldwide
• Elektrické nářadí Bosch | Elektrické nářadí Bosch
• Bosch Elektrowerkzeuge und Zubehör | Bosch Elektrowerkzeuge
• Bosch el-værktøj | Bosch el-værktøj
• Bosch-sähkötyökalut | Bosch-sähkötyökalut
• Outillage électroportatif Bosch | Outillage électroportatif Bosch
• Ηλεκτρικά εργαλεία Bosch | Ηλεκτρικά εργαλεία Bosch
• Bosch elektromos kéziszerszámok | Bosch elektromos kéziszerszámok
• Elektronarzędzia Bosch | Elektronarzędzia Bosch
• Scule electrice Bosch | Scule electrice Bosch
• Bosch električni alati | Bosch električni alati
• Bosch Услуги | Электроинструменты Bosch
• Elektrické náradie Bosch | Elektrické náradie Bosch
• Invented for life | Bosch Global
• Contato | Bosch no Brasil
• Ana Sayfa | Bosch Türkiye
• Početna | Bosch u Hrvatskoj
• Herramientas eléctricas de Bosch | Bosch Professional
• Herramientas eléctricas de Bosch | Bosch Professional
• herramientasbosch.net
• bosch-professional.com/wac/

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