DEWALT DCG409 Small Angle Grinder Instruction Manual

DEWALT DCG409 Small Angle Grinder

Specifications

• Voltage: 18 VDC
• Battery Type: Li-Ion
• Max. Power Output: 1647 W
• Rated Speed: 9000 min-1
• Wheel Diameter: 125 mm
• Wheel Thickness (max): 6 mm
• Spindle Diameter: M14
• Spindle Length: 21.5 mm
• Weight (without battery pack): 1.81 kg

Product Usage Instructions

1. Safety Guidelines:

Always read the instruction manual to reduce the risk of injury. Pay attention to the following signal words:

• DANGER: Indicates an imminently hazardous situation which could result in death or serious injury.
• WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or injury.

2. Initial Setup:

Before use, ensure the battery pack is fully charged. Insert the battery into the tool securely.

3. Operating the Small Angle Grinder:

1. Hold the grinder securely with both hands.
2. Avoid applying excessive pressure on the tool during operation.
3. Ensure the work area is clear and secure before starting the tool.
4. Adjust the guard position as needed for different cutting or grinding tasks.

4. Maintenance:

Regularly inspect the tool for any damage or wear. Clean the
grinder after each use to prevent dust buildup.

Frequently Asked Questions

Q: How do I change the grinding wheel on the DCG409?

A: To change the grinding wheel, follow these steps:

1. Disconnect the tool from the power source.
2. Use the provided wrench to loosen the wheel nut.
3. Remove the old wheel and replace it with a new one of the same specifications.
4. Tighten the wheel nut securely before operating the tool again.

Q: What should I do if I notice excessive vibration during operation?

A: Excessive vibration may indicate a problem with the tool or accessory. Stop using the grinder immediately and inspect for any issues such as loose parts or worn-out components.
If the problem persists, contact DEWALT customer support for assistance.

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English
SMALL ANGLE GRINDER DCG409
Congratulations!
You have chosen a DEWALT tool. Years of experience, thorough product development and innovation make DEWALT one of the most reliable partners for professional power tool users.

Technical Data

Voltage Type Battery type Max. Power Output Rated speed Wheel diameter Wheel thickness (max) Spindle diameter Spindle length Weight (without battery pack)

DCG409

VDC

18

1

LiIon

W 1647

min1 9000

mm 125

mm

6

M14

mm 21.5

kg 1.81

ECDeclaration of Conformity

Machinery Directive
o
Cordless Small Angle Grinder DCG409
DEWALT declares that these products described under Technical Data are in compliance with: 2006/42/EC, EN607451:2009+A11:2010, EN6074523:2011 +A2:2013 +A11:2014 +A12:2014 +A13:2015.
These products also comply with Directive 2014/30/EU and 2011/65/EU. For more information, please contact DEWALT at the following address or refer to the back of the manual.
The undersigned is responsible for compilation of the technical file and makes this declaration on behalf of DEWALT.

Noise values and/or vibration values (triax vector sum) according to EN607452:

LPA (emission sound pressure level)

dB(A) 83

LWA (sound power level)

dB(A) 94

K (uncertainty for the given sound level)

dB(A) 3

Surface grinding Vibration emission value ah,AG = Uncertainty K =
Disc sanding Vibration emission value ah,DS = Uncertainty K =

m/s2 8.3 m/s2 1.5
m/s2 2.6 m/s2 1.5

The vibration and/or noise emission level given in this information
sheet has been measured in accordance with a standardised test
given inEN60745 and may be used to compare one tool with
another. It may be used for a preliminary assessment of exposure. WARNING: The declared vibration and/or noise emission level represents the main applications of the tool. However if the tool is used for different applications, with different accessories or poorly maintained, the vibration and/or noise emission may differ. This may significantly increase the exposure level over the total working period.
An estimation of the level of exposure to vibration and/or noise should also take into account the times when the tool is switched off or when it is running but not actually doing the job. This may significantly reduce the exposure level over the total working period.
Identify additional safety measures to protect the operator from the effects of vibration and/or noise such as: maintain the tool and the accessories, keep the hands warm (relevant for vibration), organisation of work patterns.

Markus Rompel VicePresident Engineering, PTEEurope DEWALT, RichardKlingerStraße 11, 65510, Idstein, Germany
a WARNING: To reduce the risk of injury, read the instruction manual.
Definitions:

Safety Guidelines

The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to
these symbols. DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury. WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury. CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in property damage.
Denotes risk of electric shock.
Denotes risk of fire. GENERAL POWER TOOL SAFETY WARNINGS
WARNING: Read all safety warnings, instructions,

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Batteries

Chargers/Charge Times (Minutes)

Cat #
DCB546 DCB547 DCB548 DCB181 DCB182 DCB183/B DCB184/B DCB185 DCB187 DCB189

VDC

Ah Weight (kg) DCB104 DCB107 DCB112 DCB113 DCB115 DCB116 DCB117 DCB118 DCB132 DCB119

18/54 6.0/2.0 1.05

60 270 170 140 90

80

40

60 90

X

18/54 9.0/3.0 1.46

75 420 270 220 135 110* 60

75 135 X

18/54 12.0/4.0 1.44 120 540 350 300 180 150 80 120 180 X

18 1.5 0.35

22

70 45 35 22

22

22

22 22 45

18 4.0 0.61 60/40 185 120 100 60 60/45 60/40 60/40 60 120

18 2.0 0.40

30

90 60 50 30

30

30

30 30 60

18 5.0 0.62 75/50 240 150 120 75 75/60 75/50 75/50 75 150

18 1.3 0.35

22

60 40 30 22

22

22

22 22

X

18 3.0 0.54

45 140 90 70 45

45

45

45 45 90

18 4.0 0.54

60 185 120 100 60

60

60

60 60 120

*Date code 201811475B or later **Date code 201536 or later

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 mainsoperated (corded) power tool or batteryoperated (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 residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.
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, nonskid 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 offposition 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 energising 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 jewellery. Keep your hair and clothing away from moving parts. Loose clothes, jewellery 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 dustrelated hazards.
h ) Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore

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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.
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 130 °C 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.
ADDITIONAL SPECIFIC SAFETY RULES
Safety Instructions for All Operations
a ) This power tool is intended to function as a grinder, sander, wire brush or cutoff tool. 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.
b ) Operations such as polishing are not recommended to be performed with this power tool. Operations for which the power tool was not designed may create a hazard and cause personal injury.
c ) Do not use accessories which are not specifically designed and recommended by the tool manufacturer. Just because the accessory can be attached to your power tool, it does not assure safe operation.
d ) The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster than their rated speed can break and fly apart.
e ) The outside diameter and the thickness of your accessory must be within the capacity rating of your power tool. Incorrectly sized accessories can not be adequately guarded or controlled.
f ) Threaded mounting of accessories must match the grinder spindle thread. For accessories mounted by flanges, the arbour hole of the accessory must fit the locating diameter of the flange. Accessories that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively and may cause loss of control.
g ) Do not use a damaged accessory. Before each use inspect the accessory such as abrasive wheel for chips and cracks, backing pad for cracks, tear or

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excess wear, wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect for damage or install an undamaged accessory. After inspecting and installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum noload speed for one minute. Damaged accessories will normally break apart during this test time.
h ) Wear personal protective equipment. Depending on application, use face shield, safety goggles or safety glasses. As appropriate, wear dust mask, hearing protectors, gloves and workshop apron capable of stopping small abrasive or workpiece fragments. The eye protection must be capable of stopping flying debris generated by various operations. The dust mask or respirator must be capable of filtrating particles generated by your operation. Prolonged exposure to high intensity noise may cause hearing loss.
i ) Keep bystanders a safe distance away from work area. Anyone entering the work area must wear personal protective equipment. Fragments of workpiece or of a broken accessory may fly away and cause injury beyond immediate area of operation.
j ) Hold the power tool by insulated gripping surfaces only, 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.
k ) Never lay the power tool down until the accessory has come to a complete stop. The spinning accessory may grab the surface and pull the power tool out of your control.
l ) Do not run the power tool while carrying it at your side. Accidental contact with the spinning accessory could snag your clothing, pulling the accessory into your body.
m ) Regularly clean the power tool’s air vents. The motor’s fan will draw the dust inside the housing and excessive accumulation of powdered metal may cause electrical hazards.
n ) Do not operate the power tool near flammable materials. Sparks could ignite these materials.
o ) Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electrocution or shock.
p ) Do not use Type 11 (flaring cup) wheels on this tool. Using inappropriate accessories can result in injury.
q ) Always use side handle. Tighten the handle securely. The side handle should always be used to maintain control
of the tool at all times. WARNING: We recommend the use of a residual current device with a residual current rating of 30mA or less.

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FURTHER SAFETY INSTRUCTIONS FOR ALL OPERATIONS
Causes and Operator Prevention of Kickback
Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or any other accessory. Pinching or snagging causes rapid stalling of the rotating accessory which in turn causes the uncontrolled power tool to be forced in the direction opposite of the accessory’s rotation at the point of the binding. For example, if an abrasive wheel is snagged or pinched by the workpiece, the edge of the wheel that is entering into the pinch point can dig into the surface of the material causing the wheel to climb out or kick out. The wheel may either jump toward or away from the operator, depending on direction of the wheel’s movement at the point of pinching. Abrasive wheels may also break under these conditions. Kickback is the result of power tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given BELOW:
a ) Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces. Always use auxiliary handle, if provided, for maximum control over kickback or torque reaction during startup. The operator can control torque reaction or kickback forces, if proper precautions are taken.
b ) Never place your hand near the rotating accessory. Accessory may kickback over your hand.
c ) Do not position your body in the area where power tool will move if kickback occurs. Kickback will propel the tool in direction opposite to the wheel’s movement at the point of snagging.
d ) Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the accessory. Corners, sharp edges or bouncing have a tendency to snag the rotating accessory and cause loss of control or kickback.
e ) Do not attach a saw chain woodcarving blade or toothed saw blade. Such blades create frequent kickback and loss of control.
Safety Warnings Specific for Grinding and Abrasive CuttingOff Operations
a ) Use only wheel types that are recommended for your power tool and the specific guard designed for the selected wheel. Wheels for which the power tool was not designed cannot be adequately guarded and are unsafe.
b ) The grinding surface of centre depressed wheels must be mounted below the plane of the guard lip. An improperly mounted wheel that projects through the plane of the guard lip cannot be adequately protected.

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c ) The guard must be securely attached to the power tool and positioned for maximum safety, so the least amount of wheel is exposed towards the operator. The guard helps to protect the operator from broken wheel fragments and accidental contact with wheel and sparks that could ignite clothing.
d ) Wheels must be used only for recommended applications. For example: do not grind with the side of cutoff wheel. Abrasive cutoff wheels are intended for peripheral grinding, side forces applied to these wheels may cause them to shatter.
e ) Always use undamaged wheel flanges that are of correct size and shape for your selected wheel. Proper wheel flanges support the wheel thus reducing the possibility of wheel breakage. Flanges for cutoff wheels may be different from grinding wheel flanges.
f ) Do not use worn down wheels from larger power tools. Wheel intended for larger power tool is not suitable for the higher speed of a smaller tool and may burst.
Additional Safety Warnings Specific for Abrasive CuttingOff Operations
a ) Do not “jam” the cutoff wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback or wheel breakage.
b ) Do not position your body in line with and behind the rotating wheel. When the wheel, at the point of operations, is moving away from your body, the possible kickback may propel the spinning wheel and the power tool directly at you.
c ) When wheel is binding or when interrupting a cut for any reason, switch off the power tool and hold the power tool motionless until the wheel comes to a complete stop. Never attempt to remove the cutoff wheel from the cut while the wheel is in motion otherwise kickback may occur. Investigate and take corrective action to eliminate the cause of wheel binding.
d ) Do not restart the cutting operation in the workpiece. Let the wheel reach full speed and carefully reenter the cut. The wheel may bind, walk up or kickback if the power tool is restarted in the workpiece.
e ) Support panels or any oversized workpiece to minimise the risk of wheel pinching and kickback. Large workpieces tend to sag under their own weight. Supports must be placed under the workpiece near the line of cut and near the edge of the workpiece on both sides of the wheel.
f ) Use extra caution when making a “pocket cut” into existing walls or other blind areas. The protruding wheel may cut gas or water pipes, electrical wiring or objects that can cause kickback.

Safety Warnings Specific for Sanding Operations
a ) Do not use excessively oversized sanding disc paper. Follow manufacturer’s recommendations, when selecting sanding paper. Larger sanding paper extending beyond the sanding pad presents a laceration hazard and may cause snagging, tearing of the disc or kickback.
Safety Warnings Specific for Wire Brushing Operations
a ) Be aware that wire bristles are thrown by the brush even during ordinary operation. Do not overstress the wires by applying excessive load to the brush. The wire bristles can easily penetrate light clothing and/ or skin.
b ) If the use of a guard is recommended for wire brushing, do not allow any interference of the wire wheel or brush with the guard. Wire wheel or brush may expand in diameter due to work and centrifugal forces.
Residual Risks
In spite of the application of the relevant safety regulations and the implementation of safety devices, certain residual risks cannot be avoided. These are:
· Impairment of hearing.
· Risk of personal injury due to flying particles.
· Risk of burns due to accessories becoming hot during operation.
· Risk of personal injury due to prolonged use.
· Risk of dust from hazardous substances.
Chargers
DEWALT chargers require no adjustment and are designed to be as easy as possible to operate.
Electrical Safety The electric motor has been designed for one voltage only. Always check that the battery pack voltage corresponds to the voltage on the rating plate. Also make sure that the voltage of your charger corresponds to that of your mains.
i Your DEWALT charger is double insulated in accordance with EN60335; therefore no earth wire is required.
If the supply cord is damaged, it must be replaced only by DEWALT or an authorised service organisation.
Mains Plug Replacement (U.K. & Ireland Only) If a new mains plug needs to be fitted:
· Safely dispose of the old plug.
· Connect the brown lead to the live terminal in the plug.
· Connect the blue lead to the neutral terminal.

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WARNING: No connection is to be made to the earth terminal.
Follow the fitting instructions supplied with good quality plugs. Recommended fuse: 3 A.
Using an Extension Cable
An extension cord should not be used unless absolutely necessary. Use an approved extension cable suitable for the power input of your charger (see Technical Data). The minimum conductor size is 1 mm2; the maximum length is 30 m.
When using a cable reel, always unwind the cable completely.
Important Safety Instructions for All Battery Chargers
SAVE THESE INSTRUCTIONS: This manual contains important safety and operating instructions for compatible battery chargers (refer to Technical Data).
· Before using charger, read all instructions and cautionary markings on charger, battery pack, and product using battery pack.
WARNING: Shock hazard. Do not allow any liquid to get
inside charger. Electric shock may result. WARNING: We recommend the use of a residual current
device with a residual current rating of 30mA or less. CAUTION: Burn hazard. To reduce the risk of injury,
charge only DEWALT rechargeable batteries. Other types of batteries may burst causing personal injury
and damage. CAUTION: Children should be supervised to ensure that they do not play with the appliance.
NOTICE: Under certain conditions, with the charger plugged into the power supply, the exposed charging contacts inside the charger can be shorted by foreign material. Foreign materials of a conductive nature such as, but not limited to, steel wool, aluminum foil or any buildup of metallic particles should be kept away from charger cavities. Always unplug the charger from the power supply when there is no battery pack in the cavity. Unplug charger before attempting to clean.
· DO NOT attempt to charge the battery pack with any chargers other than the ones in this manual. The charger and battery pack are specifically designed to work together.
· These chargers are not intended for any uses other than charging DEWALT rechargeable batteries. Any other uses may result in risk of fire, electric shock or electrocution.
· Do not expose charger to rain or snow.
· Pull by plug rather than cord when disconnecting charger. This will reduce risk of damage to electric plug and cord.
· Make sure that cord is located so that it will not be stepped on, tripped over, or otherwise subjected to damage or stress.
· Do not use an extension cord unless it is absolutely necessary. Use of improper extension cord could result in risk of fire,electric shock, or electrocution.

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· Do not place any object on top of charger or place the charger on a soft surface that might block the ventilation slots and result in excessive internal heat. Place the charger in a position away from any heat source. The charger is ventilated through slots in the top and the bottom of the housing.
· Do not operate charger with damaged cord or plug– have them replaced immediately.
· Do not operate charger if it has received a sharp blow, been dropped, or otherwise damaged in any way. Take it to an authorised service centre.
· Do not disassemble charger; take it to an authorised service centre when service or repair is required. Incorrect reassembly may result in a risk of electric shock, electrocution or fire.
· In case of damaged power supply cord, the supply cord must be replaced immediately by the manufacturer, its service agent or similar qualified person to prevent any hazard.
· Disconnect the charger from the outlet before attempting any cleaning. This will reduce the risk of electric shock. Removing the battery pack will not reduce this risk.
· NEVER attempt to connect two chargers together.
· The charger is designed to operate on standard 230V household electrical power. Do not attempt to use it on any other voltage. This does not apply to the vehicular charger.
Charging a Battery (Fig. B)
1. Plug the charger into an appropriate outlet before inserting battery pack.
2. Insert the battery pack 14 into the charger, making sure the battery pack is fully seated in the charger. The red (charging) light will blink repeatedly indicating that the charging process has started.
3. The completion of charge will be indicated by the red light remaining ON continuously. The battery pack is fully charged and may be used at this time or left in the charger. To remove the battery pack from the charger, push the battery release button 15 on the battery pack.
nOTE: To ensure maximum performance and life of lithiumion battery packs, charge the battery pack fully before first use.

Charger Operation

Refer to the indicators below for the charge status of the battery pack.

Charge Indicators

F Charging

I

G Fully Charged

J

H Hot/Cold Pack Delay*

K

*The red light will continue to blink, but a yellow indicator light will be illuminated during this operation. Once the battery pack

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has reached an appropriate temperature, the yellow light will turn off and the charger will resume the charging procedure.
The compatible charger(s) will not charge a faulty battery pack. The charger will indicate faulty battery by refusing to light.
nOTE: This could also mean a problem with a charger.
If the charger indicates a problem, take the charger and battery pack to be tested at an authorised service centre.
hot/Cold Pack Delay
When the charger detects a battery pack that is too hot or too cold, it automatically starts a Hot/Cold Pack Delay, suspending charging until the battery pack has reached an appropriate temperature. The charger then automatically switches to the pack charging mode. This feature ensures maximum battery pack life.
A cold battery pack will charge at a slower rate than a warm battery pack. The battery pack will charge at that slower rate throughout the entire charging cycle and will not return to maximum charge rate even if the battery pack warms.
The DCB118 charger is equipped with an internal fan designed to cool the battery pack. The fan will turn on automatically when the battery pack needs to be cooled. Never operate the charger if the fan does not operate properly or if ventilation slots are blocked. Do not permit foreign objects to enter the interior of the charger.
Electronic Protection system
XR LiIon tools are designed with an Electronic Protection System that will protect the battery pack against overloading, overheating or deep discharge.
The tool will automatically turn off if the Electronic Protection System engages. If this occurs, place the lithiumion battery pack on the charger until it is fully charged.
Wall Mounting
These chargers are designed to be wall mountable or to sit upright on a table or work surface. If wall mounting, locate the charger within reach of an electrical outlet, and away from a corner or other obstructions which may impede air flow. Use the back of the charger as a template for the location of the mounting screws on the wall. Mount the charger securely using drywall screws (purchased separately) at least 25.4 mm long with a screw head diameter of 7­9 mm, screwed into wood to an optimal depth leaving approximately 5.5 mm of the screw exposed. Align the slots on the back of the charger with the exposed screws and fully engage them in the slots.
Charger Cleaning Instructions WARNING: Shock hazard. Disconnect the charger from the AC outlet before cleaning. Dirt and grease may be removed from the exterior of the charger using a cloth or soft nonmetallic brush. Do not use water or any cleaning solutions. Never let any liquid get inside the tool; never immerse any part of the tool into a liquid.
Battery Packs
Important Safety Instructions for All Battery Packs

When ordering replacement battery packs, be sure to include catalogue number and voltage.
The battery pack is not fully charged out of the carton. Before using the battery pack and charger, read the safety instructions below. Then follow charging procedures outlined.
READ ALL INSTRUCTIONS
· Do not charge or use battery in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Inserting or removing the battery from the charger may ignite the dust or fumes.
· Never force battery pack into charger. Do not modify battery pack in any way to fit into a noncompatible charger as battery pack may rupture causing serious personal injury.
· Charge the battery packs only in DEWALT chargers.
· DO NOT splash or immerse in water or other liquids.
· Do not store or use the tool and battery pack in locations where the temperature may fall below 4 °C (39.2 °F) (such as outside sheds or metal buildings in winter), or reach or exceed 40 °C (104 °F) (such as outside sheds or metal buildings in summer).
· Do not incinerate the battery pack even if it is severely damaged or is completely worn out. The battery pack can explode in a fire. Toxic fumes and materials are created when lithiumion battery packs are burned.
· If battery contents come into contact with the skin, immediately wash area with mild soap and water. If battery liquid gets into the eye, rinse water over the open eye for 15 minutes or until irritation ceases. If medical attention is needed, the battery electrolyte is composed of a mixture of liquid organic carbonates and lithium salts.
· Contents of opened battery cells may cause respiratory irritation. Provide fresh air. If symptoms persists, seek medical attention.
WARNING: Burn hazard. Battery liquid may be flammable
if exposed to spark or flame. WARNING: Never attempt to open the battery pack for
any reason. If battery pack case is cracked or damaged, do not insert into charger. Do not crush, drop or damage battery pack. Do not use a battery pack or charger that has received a sharp blow, been dropped, run over or damaged in any way (i.e., pierced with a nail, hit with a hammer, stepped on). Electric shock or electrocution may result. Damaged battery packs should be returned to
service centre for recycling. WARNING: Fire hazard. Do not store or carry the battery pack so that metal objects can contact exposed battery terminals. For example, do not place the battery pack in aprons, pockets, tool boxes, product kit
boxes, drawers, etc., with loose nails, screws, keys, etc. CAUTION: When not in use, place tool on its side on a stable surface where it will not cause a tripping or falling hazard. Some tools with large battery packs will stand upright on the battery pack but may be easily knocked over.

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Transportation WARNING: Fire hazard. Transporting batteries can possibly cause fire if the battery terminals inadvertently come in contact with conductive materials. When transporting batteries, make sure that the battery terminals are protected and well insulated from materials that could contact them and cause a short circuit. NOTE: Lithiumion batteries should not be put in checked baggage.
DEWALT batteries comply with all applicable shipping regulations as prescribed by industry and legal standards which include UN Recommendations on the Transport of Dangerous Goods; International Air Transport Association (IATA) Dangerous Goods Regulations, International Maritime Dangerous Goods (IMDG) Regulations, and the European Agreement Concerning The International Carriage of Dangerous Goods by Road (ADR). Lithiumion cells and batteries have been tested to section 38.3 of the UN Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria.
In most instances, shipping a DEWALT battery pack will be excepted from being classified as a fully regulated Class 9 Hazardous Material. In general, only shipments containing a lithiumion battery with an energy rating greater than 100 Watt Hours (Wh) will require being shipped as fully regulated Class 9. All lithiumion batteries have the Watt Hour rating marked on the pack. Furthermore, due to regulation complexities, DEWALT does not recommend air shipping lithiumion battery packs alone regardless of Watt Hour rating. Shipments of tools with batteries (combo kits) can be air shipped as excepted if the Watt Hour rating of the battery pack is no greater than 100 Wh.
Regardless of whether a shipment is considered excepted or fully regulated, it is the shipper’s responsibility to consult the latest regulations for packaging, labeling/marking and documentation requirements.
The information provided in this section of the manual is provided in good faith and believed to be accurate at the time the document was created. However, no warranty, expressed or implied, is given. It is the buyer’s responsibility to ensure that its activities comply with the applicable regulations.
Transporting the FlEXVOlTTM Battery
The DEWALT FLEXVOLTTM battery has two modes: Use and Transport.
Use Mode: When the FLEXVOLTTM battery stands alone or is in a DEWALT 18V product, it will operate as an 18V battery. When the FLEXVOLTTM battery is in a 54V or a 108V (two 54V batteries) product, it will operate as a 54V battery.
Transport Mode: When the cap is attached to the FLEXVOLTTM battery, the battery is in Transport mode. Keep the cap for shipping.
When in Transport mode, strings of cells are electrically disconnected within the pack resulting in 3 batteries with a lower Watt hour (Wh) rating as compared to 1 battery with a higher Watt hour rating. This increased quantity of 3 batteries with the lower Watt hour rating can exempt the pack from

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certain shipping regulations that are imposed upon the higher Watt hour batteries. For example, the Transport Example of Use and Transport Label Marking Wh rating might indicate 3 x 36 Wh, meaning 3 batteries of 36 Wh each. The Use Wh rating might indicate 108 Wh (1 battery implied). Storage Recommendations 1. The best storage place is one that is cool and dry away
from direct sunlight and excess heat or cold. For optimum battery performance and life, store battery packs at room temperature when not in use. 2. For long storage, it is recommended to store a fully charged battery pack in a cool, dry place out of the charger for optimal results. nOTE: Battery packs should not be stored completely depleted of charge. The battery pack will need to be recharged before use.
Labels on Charger and Battery Pack In addition to the pictographs used in this manual, the labels on the charger and the battery pack may show the following pictographs:
L Read instruction manual before use.
p See Technical Data for charging time. q Do not probe with conductive objects. r Do not charge damaged battery packs. s Do not expose to water. t Have defective cords replaced immediately u Charge only between 4 °C and 40 °C. v Only for indoor use.
x Discard the battery pack with due care for the environment.
y Charge DEWALT battery packs only with designated DEWALT chargers. Charging battery packs other than the designated DEWALT batteries with a DEWALT charger may make them burst or lead to other dangerous situations.
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z Do not incinerate the battery pack. B USE (without transport cap). Example: Wh rating
indicates 108 Wh (1 battery with 108 Wh).
A TRANSPORT (with builtin transport cap). Example: Wh rating indicates 3 x 36 Wh (3 batteries of 36 Wh).
Battery Type The following tools operate on a 18 volt battery pack: DCG409 These battery packs may be used: DCB181, DCB182, DCB183, DCB183B, DCB184, DCB184B, DCB185, DCB187, DCB189, DCB546, DCB547, DCB548. Refer to Technical Data for more information.
Package Contents
The package contains: 1 Angle grinder 1 125 mm Guard (Type 27) 1 Side handle 1 Flange set 1 Hex wrench 1 LiIon battery pack (C1, D1, L1, M1, P1, S1, T1, X1, Y1 models) 2 LiIon battery packs (C2, D2, L2, M2, P2, S2, T2, X2, Y2 models) 3 LiIon battery packs (C3, D3, L3, M3, P3, S3, T3, X3, Y3 models) 1 Instruction manual nOTE: Battery packs, chargers and kitboxes are not included with N models. Battery packs and chargers are not included with NT models. B models include Bluetooth® battery packs. nOTE: The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth®, SIG, Inc. and any use of such marks by DEWALT is under license. Other trademarks and trade names are those of their respective owners. · Check for damage to the tool, parts or accessories which may
have occurred during transport. · Take the time to thoroughly read and understand this manual
prior to operation.
Markings on Tool
The following pictograms are shown on the tool:
a Read instruction manual before use. g Wear ear protection. f Wear eye protection. n Visible radiation. Do not stare into light.
Date Code Position (Fig. B) The date code 19 , which also includes the year of manufacture, is printed into the housing. Example:
2020 XX XX Year and week of Manufacture
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Description (Fig. A) WARNING: Never modify the power tool or any part of it. Damage or personal injury could result. 1 Slider switch 2 Lockoff lever 3 Spindle lock button 4 Spindle 5 Side handle 6 Backing flange 7 Locking flange 8 Guard 9 Guard release lever 10 Battery pack 11 Battery release button
Intended Use The DCG409 cordless angle grinder has been designed for professional cutting, grinding, sanding and wire brush applications. DO nOT use under wet conditions or in the presence of flammable liquids or gases. This cordless angle grinder is a professional power tool. DO nOT let children come into contact with the tool. Supervision is required when inexperienced operators use this tool. · Young children and the infirm. This appliance is not
intended for use by young children or infirm persons without supervision. · This product is not intended for use by persons (including children) suffering from diminished physical, sensory or mental abilities; lack of experience, knowledge or skills unless they are supervised by a person responsible for their safety. Children should never be left alone with this product.
Features
NoVolt switch The Novolt function stops the grinder restarting without the switch being cycled if there is a break in the power supply.
Electronic Clutch This unit is equipped with an EClutchTM (Electronic Clutch), which in the event of a highload or wheel pinch, the unit will be shut off to reduce the reaction torque to the user. The switch needs to be cycled (turned on and off) to restart tool.
Kickback BrakeTM When a pinch, stall, or bindup event is sensed, the electronic brake engages with maximum force to quickly stop the wheel, reduce the movement of the grinder, and shut the grinder off. The switch will need to be released then depressed to restart tool.
PowerOFFTM Overload Protection The power supply to the motor will be reduced in case of motor overload. With continued motor overload, the tool will shut off. The switch will need to be released then depressed

to restart tool. The tool will power off each time the current load reaches the overload current value (motor burnup point). If continued overload shutdowns occur, apply less force/ weight on the tool until the tool will function without the overload engaging.
Soft Start Feature The soft start feature allows a slow speed buildup to avoid an initial jerk when starting. This feature is particularly useful when working in confined spaces.
Antivibration Side Handle The antivibration side handle offers added comfort by absorbing the vibrations caused by the tool.
ASSEMBLY AND ADJUSTMENTS WARNING: To reduce the risk of serious personal injury, turn tool off and disconnect battery pack before making any adjustments or removing/ installing attachments or accessories. An accidental
startup can cause injury. WARNING: Use only DEWALT battery packs and chargers.
Inserting and Removing the Battery Pack from the Tool (Fig. B)
nOTE: Make sure your battery pack 14 is fully charged.
To Install the Battery Pack into the Tool Handle 1. Align the battery pack 14 with the rails inside the tool’s
handle (Fig. B).
2. Slide it into the handle until the battery pack is firmly seated in the tool and ensure that you hear the lock snap into place.
To Remove the Battery Pack from the Tool 1. Press the release button 15 and firmly pull the battery pack
out of the tool handle.
2. Insert battery pack into the charger as described in the charger section of this manual.
Fuel Gauge Battery Packs (Fig. C) Some DEWALT battery packs include a fuel gauge which consists of three green LED lights that indicate the level of charge remaining in the battery pack. To actuate the fuel gauge 11 , press and hold the fuel gauge button. A combination of the three green LED lights will illuminate designating the level of charge left. When the level of charge in the battery is below the usable limit, the fuel gauge will not illuminate and the battery will need to be recharged. nOTE: The fuel gauge is only an indication of the charge left on the battery pack. It does not indicate tool functionality and is subject to variation based on product components, temperature and enduser application.
Attaching Side Handle (Fig. C) WARNING: Before using the tool, check that the handle is tightened securely.

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Screw the side handle 5 tightly into one of the holes on either side of the gear case. The side handle should always be used to maintain control of the tool at all times.
Rotating the Gear Case (Fig. D)
To improve user comfort, the gear case will rotate 90 ° for cutting operations. 1. Remove the four corner screws attaching the gear case to
motor housing. 2. Without separating the gear case from motor housing,
rotate the gear case head to desired position.
nOTE: If the gear case and motor housing become separated by more than 3.17 mm, the tool must be serviced and reassembled by a DEWALT service center. Failure to have the tool serviced may motor and bearing failure. 3. Reinstall screws to attach the gear case to the motor
housing. Tighten screws to 12.5 in.lbs. torque. Overtightening could cause screws to strip.
Guards CAUTION: Guards must be used with all grinding wheels, cutting wheels, sanding flap discs, wire brushes, and wire wheels. The tool may be used without a guard only when sanding with conventional sanding discs. Refer to Figure A to see guards provided with the unit. Some applications may require purchasing the correct guard from your local dealer or authorized service centre.
nOTE: Edge grinding and cutting can be performed with Type 27 wheels designed and specified for this purpose; 6.35 mm thick wheels are designed for surface grinding while thinner Type 27 wheels need to be examined for the manufacturer’s label to see if they can be used for surface grinding or only edge grinding/cutting. A Type 1 guard must be used for any wheel where surface grinding is forbidden. Cutting can also be performed by using a Type 41 wheel and a Type 1 guard.
nOTE: See the Accessory Chart to select the proper guard / accessory combination.
Mounting and Adjusting the OneTouchTM Guard
(Fig. F) WARNING: To reduce the risk of serious personal injury, turn tool off and disconnect battery pack before making any adjustments or removing/ installing attachments or accessories. An accidental startup can cause injury.
Adjusting the guard
For guard adjustment, the guard release lever 9 engages one of the alignment holes 15 on the guard collar using a ratcheting feature.
The engaging face is slanted and will ride over to the next alignment hole when guard is rotated in a clockwise direction (spindle facing user) but selflocks in the anticlockwise direction.
Mounting the guard (Fig. F)
1. Press the guard release lever 9 .

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2. While holding the guard release lever open, align the lugs 13 on the guard with the slots 14 on the gear case.
3. Keeping the guard release lever open, push the guard down until the guard lugs engage and rotate them in the groove on the gear case hub. Release the guard release lever.
4. With the spindle facing the operator, rotate the guard clockwise into the desired working position. Press and hold the guard release lever 9 to rotate the guard in the anticlockwise direction. nOTE: The guard body should be positioned between the spindle and the operator to provide maximum operator protection. The guard release lever should snap into one of the alignment holes 15 on the guard collar. This ensures that the guard is secure.
5. To remove the guard, follow steps 1­3 of these instructions in reverse.
Flanges and Wheels
Mounting NonHubbed Wheels (Fig. G) WARNING: Failure to properly seat the flange/ clamp nut/ wheel could result in serious injury (or damage to the tool
or wheel). CAUTION: Included flanges must be used with depressed centre Type 27 and Type 42 grinding wheels and Type 41 cutting wheels. See the Accessory Chart for more information.
WARNING: A closed, twosided cutting wheel guard is
required when using cutting wheels. WARNING: Use of a damaged flange or guard or failure
to use proper flange and guard can result in injury due to wheel breakage and wheel contact. See the Accessory Chart for more information.
1. Place the tool on a table, guard up.
2. Install the backing flange 6 on spindle 4 with the raised centre (pilot) facing the wheel. Press the backing flange into place.
3. Place wheel 20 against the backing flange, centreing the wheel on the raised centre (pilot) of the backing flange.
4. While depressing the spindle lock button and with the hex depressions facing away from the wheel, thread the locking flange 7 on spindle so that the lugs engage the two slots in the spindle.
5. While depressing the spindle lock button, tighten the locking flange 7 by hand or using the wrench supplied. (Only use a locking flange if it is in perfect condition.) Refer to Accessory Chart to see flange details.
6. To remove the wheel, reverse the above procedure.
Mounting Sanding Backing Pads (Fig. H) nOTE: Use of a guard with sanding discs that use backing pads, often called fiber resin discs, is not required. Since a guard is not required for these accessories, the guard may or may not fit correctly if used.

WARNING: Failure to properly seat the flange/ clamp nut/ wheel could result in serious injury (or damage to the tool
or wheel). WARNING: Proper guard must be reinstalled for grinding wheel, cutting wheel, sanding flap disc, wire brush or wire wheel applications after sanding applications are complete.
1. Place or appropriately thread backing pad 17 on the spindle.
2. Place the sanding disc 18 on the backing pad 17 .
3. While depressing spindle lock 3 , thread clamp nut 16 on spindle, piloting the raised hub on the clamp nut into the centre of sanding disc and backing pad.
4. Tighten the clamp nut by hand. Then depress the spindle lock button while turning the sanding disc until the sanding disc and clamp nut are snug.
5. To remove the wheel, grasp and turn the backing pad and sanding pad while depressing the spindle lock button.
Mounting and Removing Hubbed Wheels (Fig. H)
Hubbed wheels install directly on the threaded spindle. Thread of accessory must match thread of spindle.
1. Remove backing flange by pulling away from tool.
2. Thread the wheel on the spindle 4 by hand.
3. Depress the spindle lock button 3 and use a wrench to tighten the hub of the wheel.
4. Reverse the above procedure to remove the wheel.
NOTICE: Failure to properly seat the wheel before turning the tool on may result in damage to the tool or the wheel.
Mounting Wire Cup Brushes and Wire Wheels
(Fig. I) WARNING: Failure to properly seat the flange/ clamp nut/ wheel could result in serious injury (or damage to the tool
or wheel). CAUTION: To reduce the risk of personal injury, wear work gloves when handling wire brushes and
wheels. They can become sharp. CAUTION: To reduce the risk of damage to the tool, wheel or brush must not touch guard when mounted or while in use. Undetectable damage could occur to the accessory, causing wires to fragment from accessory
wheel or cup.
Wire cup brushes or wire wheels install directly on the threaded spindle without the use of flanges. Use only wire brushes or wheels provided with a threaded hub. These accessories are available at extra cost from your local dealer or authorised service centre.
1. Place the tool on a table, guard up.
2. Thread the wheel on the spindle by hand.
3. Depress spindle lock button 3 and use a wrench on the hub of the wire wheel or brush to tighten the wheel.
4. To remove the wheel, reverse the above procedure.
NOTICE: To reduce the risk of damage to the tool, properly seat the wheel hub before turning the tool on.

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Prior to Operation

· Install the guard and appropriate disc or wheel. Do not use excessively worn discs or wheels.
· Be sure the backing and locking flange are mounted correctly. Follow the instructions given in the Accessory Chart.
· Make sure the disc or wheel rotates in the direction of the arrows on the accessory and the tool.
· Do not use a damaged accessory. Before each use, inspect the accessory such as abrasive wheels for chips and cracks, backing pad for cracks, tear or excess wear, wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect for damage or install an undamaged accessory. After inspecting and installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum noload speed for one minute. Damaged accessories will normally break apart during this test time.

OPERATION

Instructions for Use
WARNING: Always observe the safety instructions and
applicable regulations. WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack before making any adjustments or removing/ installing attachments or accessories. An accidental startup can cause injury.
Proper Hand Position (Fig. H)
WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position as shown. WARNING: To reduce the risk of serious personal injury,
ALWAYS hold securely in anticipation of a sudden reaction.
Proper hand position requires one hand on the side handle 5 , with the other hand on the auxilliary handle, as shown in Figure H.
Slider Switch (Fig. A) CAUTION: Hold the main handle and body of the tool firmly to maintain control of the tool at start up and during use and until the wheel or accessory stops rotating. Make sure the wheel has come to a complete stop before laying the tool down.
nOTE: To reduce unexpected tool movement, do not switch the tool on or off while under load conditions. Allow the sander to run up to full speed before touching the work surface. Lift the tool from the surface before turning the tool off. Allow the tool
to stop rotating before putting it down. WARNING: Before connecting the tool to a power supply, be sure the slider switch is in the off position by pressing the rear part of the switch and releasing. Ensure the slider switch is in the off position as described above after

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any interruption in power supply to the tool, such as a dead battery.
To start the tool, slide the ON/OFF slider switch 3 toward the front of the tool. To stop the tool, release the ON/OFF slider switch.
For continuous operation, slide the switch toward the front of the tool and press the forward part of the switch inward. To stop the tool while operating in continuous mode, press the rear part of the slider switch and release.
Spindle Lock (Fig. I)
The spindle lock 3 is provided to prevent the spindle from rotating when installing or removing wheels. Operate the spindle lock only when the tool is turned off, unplugged from the power supply, and has come to a complete stop.
NOTICE: To reduce the risk of damage to the tool, do not engage the spindle lock while the tool is operating. Damage to the tool will result and attached accessory may spin off possibly resulting in injury.
To engage the lock, depress the spindle lock button and rotate the spindle until you are unable to rotate the spindle further.
Surface Grinding, Sanding and Wire
Brushing CAUTION: Always use the correct guard per the instructions in this manual.
To perform work on a the surface of a workpiece:
1. Allow the tool to reach full speed before touching the tool to the work surface.
2. Apply minimum pressure to the work surface, allowing the tool to operate at high speed. Material removal rate is greatest when the tool operates at high speed.
3. Maintain an appropriate angle between the tool and work surface. Refer to the chart according to particular function.

Function Grinding Sanding with Flap Disc Sanding with Backing Pad Wire Brushing

Angle 20°30° 5°10° 5°15° 5°10°

4. Maintain contact between the edge of the wheel and the work surface.
If grinding, sanding with flap discs or wire brushing move the tool continuously in a forward and back motion to avoid creating gouges in the work surface.
If sanding with a backing pad, move the tool constantly in a straight line to prevent burning and swirling of work surface.

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nOTE: Allowing the tool to rest on the work surface without moving will damage the work piece.
5. Remove the tool from work surface before turning tool off.
Allow the tool to stop rotating before laying it down. CAUTION: Use extra care when working over an edge, as a sudden sharp movement of grinder may be experienced.
Precautions To Take When Working on a Painted Workpiece 1. Sanding or wire brushing of lead based paint is NOT
RECOMMENDED due to the difficulty of controlling the contaminated dust. The greatest danger of lead poisoning is to children and pregnant women.
2. Since it is difficult to identify whether or not a paint contains lead without a chemical analysis, we recommend the following precautions when sanding any paint:
Personal safety
1. No children or pregnant women should enter the work area where the paint sanding or wire brushing is being done until all clean up is completed.
2. A dust mask or respirator should be worn by all persons entering the work area. The filter should be replaced daily or whenever the wearer has difficulty breathing. nOTE: Only those dust masks suitable for working with lead paint dust and fumes should be used. Ordinary painting masks do not offer this protection. See your local hardware dealer for the proper N.I.O.S.H. approved mask.
3. NO EATING, DRINKING or SMOKING should be done in the work area to prevent ingesting contaminated paint particles. Workers should wash and clean up BEFORE eating, drinking or smoking. Articles of food, drink, or smoking should not be left in the work area where dust would settle on them.
Environmental safety
1. Paint should be removed in such a manner as to minimize the amount of dust generated.
2. Areas where paint removal is occurring should be sealed with plastic sheeting of 4 mils thickness.
3. Sanding should be done in a manner to reduce tracking of paint dust outside the work area.
Cleaning and Disposal
1. All surfaces in the work area should be vacuumed and thoroughly cleaned daily for the duration of the sanding project. Vacuum filter bags should be changed frequently.
2. Plastic drop cloths should be gathered up and disposed of along with any dust chips or other removal debris. They should be placed in sealed refuse receptacles and disposed of through regular trash pickup procedures. During clean up, children and pregnant women should be kept away from the immediate work area.
3. All toys, washable furniture and utensils used by children should be washed thoroughly before being used again.
Edge Grinding and Cutting WARNING: Do not use edge grinding/cutting wheels for surface grinding applications because these wheels are

not designed for side pressures encountered with surface
grinding. Wheel breakage and injury may result. CAUTION: Wheels used for edge grinding and cutting may break or kick back if they bend or twist while the tool is being used. In all edge grinding/cutting operations, the open side of the guard must be positioned away from the operator. NOTICE: Edge grinding/cutting with a Type 27 wheel must be limited to shallow cutting and notching–less than 13 mm in depth when the wheel is new. Reduce the depth of cutting/notching equal to the reduction of the wheel radius as it wears down. Refer to the Accessory Chart for more information. Edge grinding/cutting with a Type 41 wheel requires usage of a Type 1 guard.
1. Allow the tool to reach full speed before touching the tool to the work surface.
2. Apply minimum pressure to the work surface, allowing the tool to operate at high speed. Grinding/cutting rate is greatest when the tool operates at high speed.
3. Position yourself so that the openunderside of the wheel is facing away from you.
4. Once a cut is begun and a notch is established in the workpiece, do not change the angle of the cut. Changing the angle will cause the wheel to bend and may cause wheel breakage. Edge grinding wheels are not designed to withstand side pressures caused by bending.
5. Remove the tool from the work surface before turning the tool off. Allow the tool to stop rotating before laying it down.
Metal Applications
When using the tool in metal applications, make sure that a residual current device (RCD) has been inserted to avoid residual risks caused by metal swarf. If the power supply is shut off by the RCD, take the tool to an
authorised DEWALT repair agent. WARNING: In extreme working conditions, conductive dust can accumulate inside the machine housing when working with metal. This can result in the protective insulation in the machine becoming degraded with a potential risk of an electrical shock. To avoid buildup of metal swarf inside the machine, we recommend to clear the ventilation slots on a daily basis. Refer to Maintenance.
Cutting Metal
For cutting with bonded abrasives, always use the guard type 1.

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When cutting, work with moderate feed, adapted to the material being cut. Do not exert pressure onto the cutting disc, tilt or oscillate the machine.
Do not reduce the speed of running down cutting discs by applying sideward pressure.
The machine must always work in an upgrinding motion. Otherwise, the danger exists of it being pushed uncontrolled out of the cut.
When cutting profiles and square bar, it is best to start at the smallest cross section.
Cutting Stone
The machine shall be used only for dry cutting.
For cutting stone, it is best to use a diamond cutting disc. Operate the machine only with additional dust protection mask.
Working Advice
Exercise caution when cutting slots in structural walls.
Slots in structural walls are subject to the countryspecific regulations. These regulations are to be observed under all circumstances.Before beginning work, consult the responsible structural engineer, architect or the construction supervisor.

MAINTENANCE

Your power tool has been designed to operate over a long period of time with a minimum of maintenance. Continuous satisfactory operation depends upon proper tool care and
regular cleaning. WARNING: To reduce the risk of serious personal injury, turn tool off and disconnect battery pack before making any adjustments or removing/ installing attachments or accessories. An accidental startup can cause injury.
The charger and battery pack are not serviceable.

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Optional Accessories WARNING: Since accessories, other than those offered by DEWALT, have not been tested with this product, use of such accessories with this tool could be hazardous. To reduce the risk of injury, only DEWALT recommended accessories should be used with this product.
Consult your dealer for further information on the appropriate accessories.
Protecting the Environment
Separate collection. Products and batteries marked
w with this symbol must not be disposed of with normal household waste.
Products and batteries contain materials that can be recovered or recycled reducing the demand for raw materials. Please recycle electrical products and batteries according to local provisions. Further information is available at www.2helpU.com.
Rechargeable Battery Pack
This long life battery pack must be recharged when it fails to produce sufficient power on jobs which were easily done before. At the end of its technical life, discard it with due care for our environment:
· Run the battery pack down completely, then remove it from the tool.
· LiIon cells are recyclable. Take them to your dealer or a local recycling station. The collected battery packs will be recycled or disposed of properly.

C
Lubrication
Your power tool requires no additional lubrication.

D
Cleaning WARNING: Blow dirt and dust out of the main housing with dry air as often as dirt is seen collecting in and around the air vents. Wear approved eye protection and approved
dust mask when performing this procedure. WARNING: Never use solvents or other harsh chemicals for cleaning the nonmetallic parts of the tool. These chemicals may weaken the materials used in these parts. Use a cloth dampened only with water and mild soap. Never let any liquid get inside the tool; never immerse any part of the tool into a liquid.

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English guard Type Type 27 Guard
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Accessory Chart

Accessory

Description

Depressed centre grinding disc

Flap wheel

Wire wheels

Wire wheels with threaded nut

Wire cup with threaded nut

Backing pad/ sanding sheet

how to Fit grinder Type 27 guard Backing flange
Type 27 depressed centre wheel Locking flange Type 27 guard Wire wheel Type 27 guard Wire brush Type 27 guard
Rubber backing pad Sanding disc Clamp nut

guard Type
Type 1 Guard
Type 1 Guard
OR Type 27 Guard

References

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