Dewalt DWE490 Large Angle Grinder Instruction Manual

DWE490 DWE492 DWE492S
DWE493 DWE494
WWW.DEWALT.com
Instruction Manual 

LARGE ANGLE GRINDER

DWE490, DWE492, DWE492S, DWE493, DWE494
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
The vibration and/or noise emission level given in this information sheet has been measured in accordance with a standardized test given in EN60745 and may be used to compare one tool with another. It may be used for a preliminary assessment of exposure.

Noise values and/or vibration values (triax vector sum) according to EN60745:

Surface grinding

Disc sanding

The vibration and/or noise emission levels are given in this information sheet have been measured in accordance with a standardized test is given in EN60745 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 ibration and/or noise such as: maintaining the tool and the accessories, keep the hands warm (relevant for vibration), and organization of work patterns.

EC-Declaration of Conformity

Machinery Directive

Large Angle Grinder
DWE490, DWE492, DWE492S, DWE493, DWE494
DeWALT declares that these products described under Technical
Data are in compliance with:
2006/42/EC, EN60745-1:2009 +A11:2010,
EN60745-2-3:2011 +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 the compilation of the technical file and makes this declaration on behalf of DeWALT.

Markus Rompel
Vice President of Engineering, PTE-Europe
DeWALT, Richard-Klinger-Straße 11,
D-65510, Idstein, Germany
13.12.2019

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 that, if not avoided, will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation that, if not avoided, may result in minor or moderate injury.
NOTICE: Indicates a practice not related to personal injury that, 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, illustrations, and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire, and/or serious injury. SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE. The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

1. Work Area Safety
   a ) Keep the 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 that may ignite dust or fumes.
   c ) Keep children and bystanders away while operating the 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 the 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. The 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. The 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, non-skid safety shoes, hard hat or hearing protection used
   for appropriate conditions will reduce personal injuries.
   c ) Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents.
   d ) Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
   e ) Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
   f ) Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from moving parts. Loose clothes, jewelry, or long hair can be
   caught in moving parts.
   g ) If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. The use of dust collection can reduce dust-related hazards.
   h ) Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe
   injury within a fraction of a second.
4. Power Tool Use and Care
   a ) Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it
   was designed.
   b ) Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
   c ) Disconnect the plug from the power source and/ or remove the battery pack, if detachable, from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
   d ) Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool.Power tools are dangerous in the hands of untrained users.
   e ) Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
   f ) Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
   g ) Use the power tool, accessories and tool bits, etc. in accordance with these instructions, taking into account the working conditions and the work to be
   performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
   h ) Keep handles and grasping surfaces dry, clean, and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the
   tool in unexpected situations.
5.  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.

Additional Specific Safety Rules for Large Angle Grinders
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. Failureto follow all instructions listed below may result in electric shock, fire and/or serious injury.
b ) Operation such as polishing is 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 that 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 cannot be adequately guarded or controlled.
f ) Threaded mounting of accessories must match the grinder spindle thread. For accessories mounted by flanges, the arbor 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 the abrasive wheel for chips and cracks, backing pad for cracks, tear, or excess wear, and wire brush for loose or cracked wires. If a 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 test time.
h ) Wear personal protective equipment. Depending on the application, use a face shield, safety goggles or safety glasses. As appropriate, wear a dust mask, hearing protectors, gloves and a 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  earing loss.
i ) Keep bystanders a safe distance away from work area. Anyone entering the work area must wear personal protective equipment. Fragments of a workpiece or of a broken accessory may fly away and cause injury beyond the immediate area of operation.
j ) Hold power tool by insulated gripping surfaces only, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.
k ) Position the cord clear of the spinning accessory. If you lose control, the cord may be cut or snagged and your hand or arm may be pulled into the spinning accessory.
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 your control.
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 your body.
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 electrical hazards.
o ) Do not operate the power tool near flammable materials. Sparks could ignite these materials.
p ) Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electrocution or shock.

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 the 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:

• Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces. Always use an 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 are taken.
• Never place your hand near the rotating accessory. The accessory may kick back over your hand.
• Do not position your body in the area where the power tool will move if kickback occurs. Kickback will propel the tool in a direction opposite to the wheel’s movement at
  the point of snagging.
• 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.
• 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 Cutting-Off Operations

• 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.
•  The grinding surface of center 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.
• The guard must be securely attached to the power tool and positioned for maximum safety, so the least amount of wheel is exposed to the operator. The guard helps to protect the operator from broken wheel fragments, accidental contact with the wheel, and sparks that could ignite clothing.
• Wheels must be used only for recommended applications. For example: do not grind with the side of the cut-off wheel. Abrasive cut-off wheels are intended for peripheral grinding, side forces applied to these wheels may cause them to shatter.
• Always use undamaged wheel flanges that are of the 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 wheel flanges.
• Do not use worn-down wheels from larger power tools. The wheel intended for a larger power tool is not suitable for the higher speed of a smaller tool and may burst.

Additional Safety Warnings Specific for Abrasive Cutting-Off Operations

•  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 cutting the possibility of kickback or wheel breakage.
• 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.
• When the 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 ta 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.
• 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 kick back if the power tool is restarted in the workpiece.
• Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickbackLarge 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.
• Use extra caution when making a “pocket cut” in 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

•  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 BrushingOperations

• Be aware that wire bristles are thrown by the brush even during ordinary operations. Do not overstress the wires by applying excessive load to the brush. The wire bristles can easily penetrate light clothing and/or skin.
•  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 workload and centrifugal forces.
  Additional Safety Rules for Grinders
• Do not use Type 11 (flaring cup) wheels on this tool. Using inappropriate accessories can result in injury.
• 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. 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.

Electrical Safety
The electric motor has been designed for one voltage only. Always check that the power supply corresponds to the voltage on the rating plate.
Your DeWALT tool is double insulated in accordance with EN60745; therefore no earth wire is required.
WARNING: 115 V units have to be operated via a fail-safe isolating transformer with an earth screen between the primary and secondary winding. If the supply cord is damaged, it must be replaced only by DeWALT or an authorized service organization.
Note: This device is intended for the connection to a power supply system with a maximum permissible system impedance Zmax of 0.28 Ω at the interface point (power service box)of user’s supply. The user has to ensure that this device is connected only to a power system that fulfills the requirement above. If necessary, the user can ask the public power supply company for the system impedance at the interface point. 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.

WARNING: No connection is to be made to the earth terminal. Follow the fitting instructions supplied with good quality plugs. Recommended fuse: 13 A.
Using an Extension Cable If an extension cable is required, use an approved 3–core extension cable suitable for the power input of this tool (see Technical Data). The minimum conductor size is 1.5 mm 2 ; the maximum length is 30 m. When using a cable reel, always unwind the cable completely. Package Contents

Package Contains:

• 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:
Read the instruction manual before use.
Wear ear protection.
Wear eye protection.
Date Code Position (Fig. A)
The date code  24 , which also includes the year of manufacture, is printed into the housing. Example:
2020 XX XX
Year of Manufacture
2020 XX XX
Year of Manufacture
Description (Fig. A, D)
WARNING: Never modify the power tool or any part of it. Damage or personal injury could result.

1. On/off trigger
2. Lock-off button
3.  Spindle lock
4. Spindle
5. Guard
6. Guard screw
7. Side handle
8.  Lock-on button (DWE494 only)
9. Two-pin spanner
10.  Backing flange
11. Threaded clamp nut

Intended Use
Your heavy-duty angle grinder has been designed for professional grinding, sanding, wire brush and cutting. DO NOT use under wet conditions or in the presence of flammable liquids or gases. These heavy-duty angle grinders are professional power tools. 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.

No-volt Release Switch DWE494 only
The on/off switch has a no-volt release function. If the tool should become disconnected from the power source for any reason, the switch has to be deliberately reactivated.
Soft Start Feature DWE492S and DWE494
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 confined spaces.
ASSEMBLY AND ADJUSTMENTS
WARNING: To reduce the risk of serious personal injury, turn tool off and disconnect the tool from the power source before making any adjustments or removing/installing attachments or accessories. Before reconnecting the tool, depress and release the trigger switch to ensure that the tool is off.
Attaching Side Handle (Fig. B)
WARNING: Before using the tool, check that the handle is tightened securely.
WARNING: The side handle should always be used to maintain control of the tool at all times. Screw the side handle  7  tightly into one of the holes  13  on either side of the gear case.
Mounting and Removing a Keyed Guard (Fig. A, C)
WARNING: To reduce the risk of serious personal injury, turn the tool off and disconnect the tool from the power source before making any adjustments or removing/installing attachments or accessories. Before reconnecting the tool, depress and release the trigger switch to ensure that the tool is off.
CAUTION: Guards must be used with this grinder.
When using the grinder for cutting metal or masonry a Type 1 guard MUST be used. Type 1 guards are available at extra cost from DeWALT distributors.
Note: Please refer to the Grinding and Cutting Accessory
The chart at the end of this section shows other accessories that can be used with these grinders.

1.  Place the angle grinder on a table, spindle  4  up.
2.  Align the lugs  14  with the notches  15.
3. Press the guard  5  down and rotate it to the required position.
4. securely tighten the screw  6 .
5. To remove the guard, slacken the screw.
   CAUTION: If the guard cannot be tightened by the adjusting screw, do not use the tool. To reduce the risk of personal injury, take the tool and guard to a service center to repair or replace the guard.

Fitting and Removing a Grinding or Cutting Disc (Fig. A, D, E)
WARNING: Do not use a damaged disc.

1. Place the tool on a table, and guard up.
2.  Fit the backing flange  10  correctly onto spindle  4  (Fig. D).
3. lace the disc  16  on the backing flange  10  (Fig. E1). When fitting a disc with a raised center, make sure that the raised center 17  is facing the backing flange  10 .
4. Screw the threaded clamp nut  11  onto the spindle  4  (Fig. D):
   a. The ring on the threaded clamp nut  11  must face towards the disc when fitting a grinding disc (Fig. E1);
   b. The ring on the threaded clamp nut  11  must face away from the disc when fitting a cutting disc (Fig. E2).
5.  Press the spindle lock button  3  and rotate the spindle  4  until it locks in position.
6. Tighten the threaded clamp nut  11  with the two-pin spanner supplied.
7.  Release the spindle lock.
8. To remove the disc, loosen the threaded clamp nut  11  with the two-pin spanner. Fitting and Removing a Backing Pad/ Sanding Sheet (Fig. A, D, F)

Fitting and Removing a Backing Pad/ Sanding Sheet (Fig. A, D, F)

1. Place the tool on a table or flat surface, with the guard facing up.
2.  Remove the backing flange  10 .
3. Place the rubber backing pad correctly onto the spindle  4 .
4. Place the sanding sheet on the rubber backing pad.
5. Screw the threaded sanding clamp nut  12  supplied with the backing pad onto the spindle. The ring on the threaded clamp nut must face towards the rubber backing pad.
6. Press the spindle lock button  3  and rotate the spindle  4  until it locks in position.
7. Tighten the threaded sanding clamp nut  12  with the two-pin spanner  9.
8. Release the spindle lock.
9. To remove the rubber backing pad, loosen the threaded clamp nut  12  with the two-pin spanner  9 .

Fitting a Wire Cup Brush
Screw the wire cup brush directly onto the spindle without the use of the spacer and threaded flange.
Prior to Operation

• Install the guard and appropriate disc or wheel. Do not use excessively worn discs or wheels.
• Be sure the inner and outer flange is mounted correctly. Follow the instructions given in the Grinding and Cutting 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 inspects the accessory such as abrasive wheels for chips and cracks, backing pad for cracks, tear or excess wear, and wire brush for loose or cracked wires. If a 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 test time.
• Never use blotters together with bonded abrasive products.
• Do not work with the grinding cup without a suitable guard in place.
• Do not strain the machine so heavily that it comes to a standstill. after heavily straining the power tool, continue to run it at no-load for several minutes to cool down the accessory. Do not touch grinding and cutting discs before they have cooled down. The discs can become very hot while working.
• Do not use the power tool with a cut-off stand.

OPERATION

WARNING: Always observe the safety instructions and
applicable regulations.
WARNING: To reduce the risk of serious personal injury, turn tool off and disconnect tool from power source before making any adjustments or removing/installing attachments or accessories. Before reconnecting the tool, depress and release the trigger switch to ensure that the tool is off.
WARNING:.

•  Ensure all materials to be ground or cut are secured in place.
• Secure and support the workpiece. Use clamps or a vice to hold and support the workpiece to a stable platform. It is important to clamp and support the workpiece securely to prevent movement of the workpiece and loss of control. Movement of the workpiece or loss of control may create a hazard and cause personal injury.
•  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 the wheel.
• Always wear regular working gloves while operating this tool.
• Apply only gentle pressure to the tool. Do not exert side pressure on the disc.
• Avoid overloading. Should the tool become hot, let it run a few minutes under no load conditions to cool the accessory. Do not touch accessories before they have
  cooled. The discs become very hot during use.
• Never work with the grinding cup without a suitable protection guard in place.
• Do not use the power tool with a cut-off stand. Never use blotters together with bonded abrasive products.
• Be aware, the wheel continues to rotate after the tools is switched off.
• The tool is not designed to be used with a grinding cup.
• Do not use separate reducing bushings or adapters to adapt large hole abrasive wheels.

Proper Hand Position (Fig. A, G)
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  7 , with the other hand on the body of the tool, as shown in Figure G.
Switching On and Off (Fig. A)
The on/off switch is equipped with an unlocking switch. To run the tool, depress the lock-off button  2  and subsequently operate the on/off trigger  1 . Release the lock-off button  2 .To stop the tool, release the switch.
Lock-on Button (Fig. A)
DWE494 Only
For continuous operation depress the lock-on button  8  and release the on/off trigger switch. To stop the tool press the on/off switch again. The lock-on button can be permanently removed without compromising compliance with regulatory agencies shown on the tool’s nameplate. Removal of the lock pin must be done by a DeWALT Service Centre.
Spindle Lock (Fig. A)
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 the 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.
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 the metal swarf. If the power supply is shut off by the RCD, take the tool to
authorized 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 the build-up of metal swarf inside the machine, we recommend clearing the ventilation slots on a daily basis. Refer to Maintenance.
Cutting Metal
For cutting with bonded abrasives, always use a protection guard type 1. 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 upgrading 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.
Rough Grinding
never use a cutting disc for roughing. always use the guard type 27. 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 discolor and no grooves are formed.
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 an additional dust protection mask.
Working Advice
Exercise caution when cutting slots in structural walls. Slots in structural walls are subject to country-specific regulations. These regulations are to be observed under all
circumstances. Before beginning work, consult the responsible structural engineer, architect or construction supervisor.
Using Flap Discs
WARNING: Metal dust build-up. Extensive use of flap discs in metal applications can result in an increased potential for electric shock. To reduce this risk, insert an
RCD before use and clean the ventilation slots daily by blowing dry compressed air into the ventilation slots inaccordance with the below maintenance instructions.

MAINTENANCE
Your DeWALT 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 the tool off and disconnect tool from the power source before making any adjustments or removing/installing attachments or accessories. Before reconnecting the tool, depress and release the trigger switch to ensure that the tool is off.
Lubrication Your power tool requires no additional lubrication.
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 masks when performing this procedure.
WARNING: Never use solvents or other harsh chemicals for cleaning the non-metallic 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.
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 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.

Danmark
DeWALT (Stanley Black&Decker AS)
Roskildevej 22
2620 Albertslund
Tel: 70 20 15 10
Fax: 70 22 49 10
www.dewalt.dk