DCG407 - Uncategorized DEWALT - Free user manual and instructions

USER MANUAL DCG407 DEWALT

Cordless Small Angle Grinder DCG407, DCG408 DeWALT declares that these products described under Technical Data are in compliance with: 2006/42/EC, EN 62841‑1:2015+A11:2022; EN IEC 62841‑2‑3:2021+A11:2021.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 themanual.The undersigned is responsible for compilation of the technical file and makes this declaration on behalf ofDeWALT.Markus Rompel Vice‑President Engineering, PTE‑Europe DeWALT, Richard‑Klinger‑Straße 11, 65510, Idstein, Germany 30.11.2024compare one tool with another. It may be used for a preliminary assessment ofexposure. 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 workingperiod.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 workingperiod.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 workpatterns. WARNING : Grinding thin sheets of metal or other easily vibrating structures with a large surface can result in a total noise emission much higher (up to 15dB) than the declared noise emission values. Such workpieces should as far as possible be prevented from emitting sound by suitable measures such as the application of heavy flexible damping mats. The increased noise emission is also to be considered for both the risk assessment of noise exposure and selecting adequate hearingprotection.The vibration and/or noise emission level given in this information sheet has been measured in accordance with a standardised test given in EN62841 and may be used to DCG407 DCG408Voltage V 18 18Type 1 1Battery type Li‑Ion Li‑IonNo load speed min 9000 9000Grinding wheel diameter mm 125 125Grinding wheel thickness (max) mm

Cutting off wheel diameter mm 125 125Cutting off wheel thickness (max) mm

(emission sound pressure level) dB(A) 87 87

(sound power level) dB(A) 95 95 K (uncertainty for the given sound level)dB(A) 3 3Surface grindingVibration emission value a h,AG

7.9 7.9Uncertainty K =

2.7 2.7Uncertainty K =

6.8 6.8Uncertainty K =

6.8 6.8Uncertainty K =

WARNING: Read all safety warnings, instructions,

illustrations, and specifications in this manual, including the battery and charger sections provided in an original tool manual or the separate Batteries and Chargers manual. Manuals can be obtained by contacting Customer Service (refer to the back page of thismanual). Technical Data English (original instructions)

SLIDE SWITCH SMALL ANGLE GRINDER

DCG40833 EnGLIsh or medication. A moment of inattention while operating power tools may result in serious personalinjury. b ) Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat or hearing protection used for appropriate conditions will reduce personalinjuries. c ) Prevent unintentional starting. Ensure the switch is in the off position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energising power tools that have the switch on invitesaccidents. 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 personalinjury. e ) Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpectedsituations. 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 movingparts. g ) If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-relatedhazards. h ) Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of asecond.

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 wasdesigned. 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 berepaired. 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 toolaccidentally. 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 untrainedusers. 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 powertools. f ) Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier tocontrol. 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 hazardoussituation. h ) Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping

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 seriousinjury.

SAVE ALL WARNINGS AND INSTRUCTIONS

FOR FUTUREREFERENCE The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) powertool.

a ) Keep work area clean and well lit. Cluttered or dark areas inviteaccidents. 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 orfumes. c ) Keep children and bystanders away while operating a power tool. Distractions can cause you to losecontrol.

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 electricshock. 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 orgrounded. c ) Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electricshock. 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 electricshock. 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 electricshock. 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 electricshock.

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

WARNING: To reduce the risk of injury, read the

instructionmanual. Definitions: Safety Guidelines The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to thesesymbols.

DANGER: Indicates an imminently hazardous situation

which, if not avoided, will result in death or seriousinjury.

WARNING: Indicates a potentially hazardous situation which,

if not avoided, could result in death or seriousinjury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderateinjury. NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in propertydamage.

Denotes risk of electricshock.

Kickback and Related Warnings 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 thebinding. f ) The outside diameter and the thickness of your accessory must be within the capacity rating of your power tool. Incorrectly sized accessories cannot be adequately guarded orcontrolled. g ) The dimensions of the accessory mounting must fit the dimensions of the mounting hardware of the power tool. Accessories that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively and may cause loss ofcontrol. h ) 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 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 no‑load speed for one minute. Damaged accessories will normally break apart during this testtime. i ) 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 the particular application. Prolonged exposure to high intensity noise may cause hearingloss. j ) 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 ofoperation. k ) 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 electricshock. l ) 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 yourcontrol. m ) 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 yourbody. n ) 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 electricalhazards. o ) Do not operate the power tool near flammable materials. Sparks could ignite thesematerials. p ) Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electrocution orshock.

ADDITIONAL SPECIFIC SAFETY RULES

Safety Instructions for All Operations a ) This power tool is intended to function as a grinder, sander, wire brush or cut‑off 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 seriousinjury. b ) Operations such as polishing or hole cutting are not to be performed with this power tool. Operations for which the power tool was not designed may create ahazard and cause personalinjury. c ) Do not convert this power tool to operate in a way which is not specifically designed and specified by the tool manufacturer. Such a conversion may result in a loss of control and cause serious personalinjury. d ) Do not use accessories which are not specifically designed and specified by the tool manufacturer. Just because the accessory can be attached to your power tool, it does not assure safeoperation. e ) 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 flyapart. surfaces do not allow for safe handling and control of the tool in unexpectedsituations.

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 batterypack. b ) Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury andfire. 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 afire. 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 orburns. 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 ofinjury. f ) Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 130°C may causeexplosion. 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 offire.

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 ismaintained. b ) Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorised serviceproviders.35 EnGLIsh Additional Safety Instructions 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/orskin. b ) If the use of a guard is specified 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 centrifugalforces. Additional Safety Instructions for Sanding Operations a ) Use proper sized sanding disk paper. Follow manufacturers recommendations, when selecting sanding paper. Larger sanding paper extending too far beyond the sanding pad presents a laceration hazard and may cause snagging, tearing of the disc orkickback. Additional Safety Warnings Specific for Cutting‑Off Operations a ) Do not "jam" the cut‑off 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 wheelbreakage. 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 atyou. c ) When the wheel is binding or when interrupting a cut for any reason, switch off the power tool and hold it motionless until the wheel comes to a complete stop. Never attempt to remove the cut‑off wheel from the cut while the wheel is in motion otherwise kickback may occur. Investigate and take corrective action to eliminate the cause of wheelbinding. d ) Do not restart the cutting operation in the workpiece. Let the wheel reach full speed and carefully re‑enter the cut. The wheel may bind, walk up or kickback if the power tool is restarted in theworkpiece. e ) Support panels or any oversized workpiece to minimize 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 thewheel. 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 causekickback. g ) Do not attempt to do curved cutting. 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, which can lead to seriousinjury. g ) When using dual purpose wheels always use the correct guard for the application being performed. Failure to use the correct guard may not provide the desired level of guarding, which could lead to seriousinjury. Safety Warnings Specific for Grinding and Cutting‑Off Operations a ) Use only wheel types that are specified 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 areunsafe. 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 adequatelyprotected. 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, accidental contact with wheel and sparks that could igniteclothing. d ) Wheels must be used only for specified applications. For example: do not grind with the side of cut‑off wheel. Abrasive cut-off wheels are intended for peripheral grinding, side forces applied to these wheels may cause them toshatter. 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 cut-off wheels may be different from grinding wheelflanges. f ) Do not use worn down wheels from larger power tools. A wheel intended for larger power tool is not suitable for the higher speed of a smaller tool and mayburst. 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 theseconditions. 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 with both hands 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 start‑up. The operator can control torque reaction or kickback forces, if proper precautions aretaken. b ) Never place your hand near the rotating accessory. Accessory may kickback over yourhand. 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 ofsnagging. 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 orkickback. e ) Do not attach a saw chain woodcarving blade, segmented diamond wheel with a peripheral gap greater than 10mm or toothed sawblade. Such blades create frequent kickback and loss ofcontrol.36 ENGLISH Description (Fig. A)

WARNING: Never modify the power tool or any part of it.

Damage or personal injury couldresult.

Battery release button

Main handle Intended Use The DCG407 and DCG408 cordless angle grinders have been designed for professional cutting, grinding, sanding and wire brushapplications. DO NOT use under wet conditions or in the presence of flammable liquids orgases. Date Code Position (Fig.F) The production date code

consists of a 4‑digit year followed by a 2‑digit week and is extended by a 2‑digit factorycode. Markings on Tool The following pictograms are shown on the tool: Read instruction manual beforeuse. Wear earprotection. Wear eyeprotection. Always operate with twohands. Do not use the Type B guard for cut‑offoperations. 2 Li‑Ion battery packs (C2, D2, E2, G2, H2, L2, M2, P2, Q2, S2, T2, U2, X2, Y2, Z2 models) 3 Li‑Ion battery packs (C3, D3, E3, G3, H3, L3, M3, P3, Q3, S3, T3, U3, X3, Y3, Z3 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. Bmodels include Bluetooth® batterypacks. 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 respectiveowners.

• Check for damage to the tool, parts or accessories which may have occurred duringtransport.

• Take the time to thoroughly read and understand this manual prior tooperation. Package Contents The package contains: 1 Angle grinder 1 125mm Guard (Type B) 1 Clip‑on guard 1 Side handle 1 Flange set 1 Hex wrench 1 Li‑Ion battery pack (C1, D1, E1, G1, H1, L1, M1, P1, Q1, S1, T1, U1, X1, Y1, Z1 models) Battery Type These battery packs may be used: Battery (kg) Battery (kg) DCB546 1.08 DCB185 0.35

Refer to the battery/charger manual for moreinformation. 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 ofhearing.

• Risk of personal injury due to flyingparticles.

• Risk of burns due to accessories becoming hot duringoperation.

• Risk of personal injury due to prolongeduse.

• Risk of dust from hazardoussubstances. Reducing Dust Exposure Before starting work, check the hazard class of the dust that will be produced when working.

WARNING: Avoid touching or breathing dust as it can be

harmful to health. Dust created when using a power tool and when conducting other construction activities can contain chemicals, minerals, or particles known to cause respiratory infections, allergic reactions, cancer, birth defects, or other reproductive harm of the user orbystanders.

• Such dust can be generated, for example, when working on hardwoods such as beech or oak, lead-based paint, concrete, masonry, or stones containing quartz.

• Material containing asbestos may be handled only byspecialists.

• Observe the relevant regulations in your country for the materials to be workedon.

• Use a dust extractor or extraction system with an officially approved protection class in compliance with the locally applicable dust protection regulations and suitable for the material to be worked on.

• Capture the resulting dust particles directly at the source and avoid deposits in the surrounding area. Use suitable extraction accessories for thispurpose. Additional measures: ʵ Make sure that the workplace is wellventilated. ʵ Wear a respirator appropriate for the type of dustgenerated.37 ENGLISH 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 Mounting the Clip‑on Guard (Fig. A, E1, E2) The clip‑on guard converts a Type B guard into a Type Aguard.

onto the Type B guard so the hook

on the end of the clip‑on guard aligns with the edge

until the lock button

engages with the locking hook

. The clip‑on guard is now locked inplace.

3. To remove the clip‑on guard, press the lock button toward

the clip‑on guard lever and the clip‑on lever will release. The clip‑on lever can now be lifted, and the clip‑on guard can be removed from the Type Bguard. Rotating the Gear Case (Fig. D) To improve user comfort, the gear case will rotate 90° for cuttingoperations.

1. Remove the four corner screws attaching the gear case to

2. Without separating the gear case from motor housing, rotate

the gear case head to desiredposition. NOTE: If the gear case and motor housing become separated by more than 3mm, the tool must be serviced and reassembled by a DeWALT service centre. Failure to have the tool serviced may result in motor and bearingfailure.

3. Reinstall screws to attach the gear case to the motor

housing. Tighten screws to 1.9–2.1Nm torque. Overtightening could cause screws tostrip. Attaching Side Handle (Fig. C)

WARNING: Before using the tool, check that the handle is

tightenedsecurely. Screw the side handle

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 alltimes.

2. Slide it into the handle until the battery pack is firmly seated

in the tool and ensure that you hear the lock snap intoplace. To Remove the Battery Pack from the Tool

1. Press the battery release button

and firmly pull the battery pack out of the toolhandle.

2. Insert battery pack into thecharger.

Fuel Gauge Battery Packs (Fig.B) Some DeWALT battery packs include a fuel gauge

, which consists of three green LED lights that indicate the level of charge remaining in the batterypack. To actuate the fuel gauge, 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 berecharged. 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 end‑userapplication. Inserting and Removing the Battery Pack from the Tool (Fig. B) NOTE: Make sure your battery pack

is fullycharged. To Install the Battery Pack into the ToolHandle

1. Align the battery pack with the rails inside the tool’s

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 start-up can causeinjury.

Use only DeWALT batteries andchargers. Features No‑Volt switch The No‑volt function stops the grinder restarting without the switch being cycled if there is a break in the powersupply. Electronic Clutch This unit is equipped with an E‑Clutch™ (Electronic Clutch), which in the event of a high‑load 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 restarttool. Kickback Brake™ When a pinch, stall, or bind‑up 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 restarttool. Power‑OFF™ 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 restarttool. The tool will power off each time the current load reaches the overload current value (motor burn‑up point). If continued overload shutdowns occur, apply less force/ weight on the tool until the tool will function without the overloadengaging. Soft Start Feature The soft start feature allows a slow speed build‑up to avoid an initial jerk when starting. This feature is particularly useful when working in confinedspaces.

DANGER: Do not use for wood cutting or woodcarving. Do

not use toothed blades of any kind. Serious injury canresult. These cordless angle grinders are professional powertools. DO NOT let children come into contact with the tool. Supervision is required when inexperienced operators use thistool.

• Young children and the infirm. This appliance is not intended for use by young children or infirm persons withoutsupervision.

• 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 thisproduct.38 ENGLISH Flanges and Wheels Mounting Non‑Hubbed Wheels (Fig.G)

WARNING: Failure to properly seat the flange/ clamp

nut/ wheel could result in serious injury (or damage to the tool orwheel).

CAUTION: Included flanges must be used with depressed centre Type 27and Type 42grinding wheels and Type41cutting wheels. Refer to the Accessory Chart for moreinformation.

WARNING: A closed, two-sided cutting wheel guard is

re quired when using cutting wheels.

WARNING: Use of a damaged flange or guard or fail ure to

use proper flange and guard can re sult in injury due to wheel breakage and wheel contact. Refer to the Accessory Chart for moreinformation.

1. Place the tool on a table, guardup.

with the raised centre (pilot) facing the wheel. Press the backing flange intoplace.

against the backing flange, centring the wheel on the raised centre (pilot) of the backingflange.

4. While depressing the spindle lock button and with the hex

depressions facing away from the wheel, thread the locking flange

5. While depressing the spindle lock button, tighten the locking

by hand or using the wrench supplied. (Only use a locking flange if it is in perfect condition.) Refer to Accessory Chart to see flangedetails.

6. To remove the wheel, reverse the aboveprocedure.

Mounting Sanding Backing Pads (Fig.A, H) NOTE: Use of a guard with sanding discs that use backing pads, often called fibre resin discs, is not required. Since a guard is not required for these accessories, the guard may or may not fit correctly ifused.

WARNING: Failure to properly seat the flange/ clamp

nut/ wheel could result in serious injury (or damage to the tool orwheel).

WARNING: Proper guard must be reinstalled for grinding

wheel, cutting wheel, sanding flap disc, wire brush or wire wheel applications after sanding applications arecomplete.

1. Place or appropriately thread backing pad

2. Place the sanding disc

spindle, piloting the raised hub on the clamp nut into the centre of san ding disc and backingpad.

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 aresnug.

5. To remove the wheel, grasp and turn the backing pad and

sanding pad while depressing the spindle lockbutton. Mounting and Removing Hubbed Wheels (Fig.I) Hubbed wheels install directly on the threaded spindle. Thread of accessory must match thread ofspindle. operatorprotection. The guard release lever should snap into one of the alignment holes

on the guard collar. This ensures that the guard issecure.

5. To remove the guard, follow steps 1–3 of these instructions

inreverse. guards provided with the unit. Some applications may require purchasing the correct guard from your local dealer or authorised servicecentre.

CAUTION: When using a Type 1/41/Type A (cut-off)/TypeB with Clip-on wheel guard for facial grinding, the wheel guard may interfere with the workpiece causing poorcontrol.

CAUTION: When using a Type 27/Type B (grinding)/TypeB with Clip-on wheel guard for cutting-off operations with bonded abrasive wheels, there is an increased risk of exposure to emitted sparks and particles, as well as exposure to wheel fragments in the event of wheelburst.

CAUTION: When using a Type 1/41/Type A (cut-off), Type 27/TypeB (grinding) wheel guard for cutting-off and facial operations in concrete or masonry, there is an increased risk of exposure to dust and loss of control resulting inkickback.

CAUTION: When using a Type A (cut-off), Type B (grinding) wheel guard with a wheel-type wire brush with a thickness greater than the maximum thickness as specified in Technical Data, the wires may catch on the guard leading to breaking ofwires. NOTE: Edge grinding and cutting can be performed with Type27wheels designed and specified for this purpose; 6.3mm thick wheels are designed for surface grinding while thinner Type27wheels 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 1/41/Type A/Type B with Clip‑on (cut‑off) wheel guard must be used for any wheel where surface grinding is forbidden. A Type 1/41/Type A/Type B with Clip‑on (cut‑off) (previously called Type 1/41) wheel guard must be used for any dual purpose (combined grinding and cutting‑off abrasive) wheels. Cutting can also be performed by using a Type1/41 wheel and a Type 1/41/Type A/Type B with Clip‑on cut‑off wheel guard previously called Type 1/41guard. NOTE: Refer to the Accessory and Guard Applications Chart to select the proper guard/accessorycombination. Mounting and Adjusting the 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 start-up can causeinjury. Adjusting the Guard For guard adjustment, the guard release lever

engages one of the alignment holes

on the guard collar using a ratchetingfeature. 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 self‑locks in the anti‑clockwisedirection. Mounting the Guard (Fig.F)

1. Press the guard release lever

2. While holding the guard release lever open, align the

on the guard with the slots

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 releaselever.

4. With the spindle facing the operator, rotate the guard

clockwise into the desired working position. Press and hold the guard release lever

to rotate the guard in the anti‑clockwisedirection. NOTE: The guard body should be positioned between the spindle and the operator to provide maximum39 EnGLIsh Surface Grinding, Sanding and Wire Brushing (Fig. K)

CAUTION: Always use the correct guard per the instructions in thismanual. To perform work on the surface of a workpiece:

1. Allow the tool to reach full speed before touching the tool to

the worksurface. Spindle Lock (Fig. A) The spindle lock

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 completestop. 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 ininjury. To engage the lock, depress the spindle lock button and rotate the spindle until you are unable to rotate the spindlefurther. Switches

CAUTION: Hold the auxiliary 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 be fore laying the tooldown. nOTE: To reduce unexpected tool movement, do not switch the tool on or off while under load conditions. Allow the grinder 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 itdown. Slider Switch (Fig.A) DCG407

WARNING: Before connecting the tool to a power supply,

be sure the slider switch is in the off position. Ensure the slider switch is in the off position after any interruption in power supply to the tool, such as the activation of a ground fault interrupter, throwing of a circuit breaker, accidental unplugging, or powerfailure. To start the tool, slide the ON/OFF slider switch

toward the front of the tool. To stop the tool, release the ON/OFF sliderswitch. 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 andrelease. Paddle Switch (Fig.A) DCG408

1. To turn the tool on, push the lock‑off lever

toward the back of the tool, then depress the paddle switch

. The tool will run while the switch isdepressed.

2. Turn the tool off by releasing the paddleswitch.

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 suddenreaction. Proper hand position requires one hand on the main handle

and the other hand on the auxilliary handle

, as shown in Fig.J. OPERATION Instructions for Use

WARNING: Always observe the safety instructions and

applicableregulations.

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 start-up can causeinjury. Prior to Operation

• Install the guard and appropriate disc or wheel. Do not use excessively worn discs orwheels.

• Be sure the threaded locking flange is mounted correctly. Follow the instructions given in the Grinding and Cutting AccessoryChart.

• Make sure the disc or wheel rotates in the direction of the arrows on the accessory and thetool.

• 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 no‑load speed for one minute. Damaged accessories will normally break apart during this testtime.

1. Remove backing flange by pulling away fromtool.

2. Thread the wheel on the spindle

and use a wrench to tighten the hub of thewheel.

4. Reverse the above procedure to remove thewheel.

NOTICE: Failure to properly seat the wheel before turning the tool on may result in damage to the tool or thewheel. Mounting WireWheels (Fig.A, I)

WARNING: Failure to properly seat the flange/ clamp

nut/ wheel could result in serious injury (or damage to the tool orwheel).

CAUTION: To reduce the risk of personal injury, wear work gloves when handling wire brushes and wheels. They can becomesharp.

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 orcup. 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 servicecentre.

1. Place the tool on a table, guardup.

2. Thread the wheel on the spindle

and use a wrench on the hub of the wire wheel or brush to tighten thewheel.

4. To remove the wheel, reverse the aboveprocedure.

NOTICE: To reduce the risk of damage to the tool, properly seat the wheel hub before turning the toolon.40 ENGLISH 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 metalswarf. If the power supply is shut off by the RCD, take the tool to an authorised DeWALT repairagent.

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 electricalshock. To avoid build‑up of metal swarf inside the machine, we recommend to clear the ventilation slots on a daily basis. Refer toMaintenance. Edge Grinding and Cutting (Fig. L)

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 mayresult.

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 theoperator. NOTICE: Edge grinding/cutting with a Type27wheel must be limited to shallow cutting and notching—less than 6.3mm 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 DCG407, DCG408 Accessory and Guard Applications for more information. Edge grinding/cutting with a Type 41wheel requires usage of a Type A/Type B with Clip-onguard.

1. Allow the tool to reach full speed before touching the tool to

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 highspeed.

3. Position yourself so that the open‑underside of the wheel is

facing away fromyou.

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 bybending.

5. Remove the tool from the work surface before turning the

tool off. Allow the tool to stop rotating before laying itdown. 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 changedfrequently.

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 pick‑upprocedures. During clean up, children and pregnant women should be kept away from the immediate workarea.

3. All toys, washable furniture and utensils used by children

should be washed thoroughly before being usedagain.

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 highspeed.

3. Maintain an appropriate angle between the tool and work

surface. Refer to the chart according to particularfunction. Function Angle Grinding 20˚‑30˚ Sanding with Flap Disc 5˚‑10˚ Sanding with Backing Pad 5˚‑15˚ Wire Brushing 5˚‑10˚

4. Maintain contact between the edge of the wheel and the

worksurface. - 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 worksurface. - If sanding with a backing pad, move the tool constantly in a straight line to prevent burning and swirling of worksurface. NOTE: Allowing the tool to rest on the work surface without moving will damage theworkpiece.

5. Remove the tool from work surface before turning tool off.

Allow the tool to stop rotating before laying itdown.

CAUTION: Use extra care when working over an edge, as a sudden sharp movement of grinder may beexperienced. 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 pregnantwomen.

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 iscompleted.

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 difficultybreathing. 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. Consult your local hardware dealer for the proper N.I.O.S.H. approvedmask.

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 onthem. Environmental Safety

1. Paint should be removed in such a manner as to minimise

the amount of dustgenerated.

2. Areas where paint removal is occurring should be sealed

with plastic sheeting of 4milsthickness.

3. Sanding should be done in a manner to reduce tracking of

paint dust outside the workarea.41 ENGLISH Protecting the Environment Products/batteries are recyclable, but if marked with the crossed‑out bin, they must not be disposed of with normal householdwaste. Run the batteries down completely and separate them, and separate any light sources from the product if possible. It is the user's responsibility to delete personal data from the product. Then take the waste to an official waste collection center or a participating retailer who will often accept it free of charge. Packaging should be discarded based on the marked material code. Operating and safety instructions should only be discarded once the applicable product is no longer inuse. Please check with your local community/municipality for waste management guidance. For further information, visit www.2helpU.com and scan the above QRcode. 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 thisproduct.

WARNING: Do not use a bonded abrasive wheel that is

past its expiration (EXP) date as marked near center of wheel (if provided). Expired wheels are more likely to burst and cause serious injury. Store bonded abrasive wheels in dry location without temperature or humidity extremes. Destroy expired or damaged wheels so they cannot beused. Consult your dealer for further information on the appropriateaccessories. 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 aliquid. Ventilation slots can be cleaned using a dry, soft non‑metallic brush and/or a suitable vacuum cleaner. Do not use water or any cleaning solutions. Wear approved eye protection and an approved dustmask. Cleaning

WARNING: Electrical shock and mechanical hazard. Remove

the battery beforecleaning.

WARNING: To ensure safe and efficient operation, always

keep the electrical appliance and the ventilation slotsclean.

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 non-metallic parts of the tool. These chemicals may Lubrication Your power tool requires no additionallubrication. 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 regularcleaning.

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 start-up can causeinjury. The charger and battery pack are notserviceable. Please refer to the back page of this manual for service centre contact information, or visit www.2helpU.com. Working Advice Exercise caution when cutting slots in structuralwalls. Slots in structural walls are subject to the country‑specific regulations. These regulations are to be observed under all circumstances. Before beginning work, consult the responsible structural engineer, architect or the constructionsupervisor. Cutting Stone The machine shall be used only for drycutting. For cutting stone, it is best to use a diamond cutting disc. Operate the machine only with additional dust protectionmask. Rough Grinding Never use a cutting disc forroughing. Always use the guard TypeB. The best roughing results are achieved when setting the machine at an angle of 30° to 40°. Move the machine back and forth with moderate pressure. In this manner, the workpiece will not become too hot, does not discolour and no grooves areformed. Cutting Metal For cutting with bonded abrasives, always use the TypeA/ Type B with Clip-onguard. When cutting, work with moderate feed, adapted to the material being cut. Do not exert pressure onto the cutting disc, tilt or oscillate themachine. Do not reduce the speed of running down cutting discs by applying sidewardpressure. The machine must always work in an upgrinding motion. Otherwise, the danger exists of it being pushed uncontrolled out of thecut. When cutting profiles and square bar, it is best to start at the smallest crosssection.42 ENGLISH Additional Information for Guards and Accessories When using segmented diamond wheels, use only diamond wheels with a peripheral gap not greater than 10mm and negative rakeangle. ≤10 mm

segmented diamond wheels with a peripheral gap greater than 10mm and/or a positive rakeangle. For all grinding, sanding, and wheel type wire brushing accessories, the lowest portion of the accessory must be contained within the guard enclosure with 2mm or greater clearance to the bottom lip ofguard. ≥2 mm43 ENGLISH Accessory and Guard Applications Application Accessory Type Accessory Guard Assembly for Reference Surface Grinding Wheel Type 27 Type B (Grinding) Cutting Off Wheel Type 41 (1A) (metal/masonry/concrete) Type A (Closed cut off) Type B guard with Clip‑on guard Wheel Type 42 (27A) (metal/masonry/concrete) Type A (Closed cut off) Type B guard with Clip‑on guard Diamond Cutting Wheel (metal/masonry/concrete) Type A (Closed cut off) Type B guard with Clip‑on guard

For acceptable diamond wheel geometry reference Additional Information for Guards and Accessories chart. Abrasive Wheels For Materials Other Than Metal Or Masonry/Concrete Type A (Closed cut off) Type B guard with Clip‑on guard Dual Purpose (combined cut‑off and grinding) Dual Purpose Abrasive Wheel Type A (Closed cut off) Type B guard with Clip‑on guard44 ENGLISH Application Accessory Type Accessory Guard Assembly for Reference Wire Brushing Wheel‑Type Wire Brush Type B (Grinding) Sanding Flap Disc (Type 27 / Type 29) Type B (Grinding) Flexible Abrasive (e.g., sandpaper) (supported by a flexible backing pad) Guard not required

Rubber backing pad and sanding clamp nut (included with rubber backing pad) available at additional cost from your local DeWALT dealer or authorised DeWALT service centre. Shrouds Concrete cutting DWE46225 Cutting shroud Guidelines for Guards and Accessories Non-approved Wheels Type 11/ T11 Hubbed Wheel Wrench Hubbed wheel wrench available at additional cost from your local DeWALT dealer or authorised DeWALT servicecentre.

DANGER: Do not use for wood cutting or woodcarving. Do

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