DWE4051 - Grinder DEWALT - Free user manual and instructions
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| Brand | DeWalt |
| Model | DWE4051 |
| Product Type | Angle Grinder (grinder) |
| Supply Voltage | 230 V |
| Power Input | 800 W |
| No-Load Speed | 11 800 min⁻¹ |
| Grinding Wheel Diameter | 125 mm |
| Spindle Diameter | M14 |
| Weight (with side handle and guard) | 1.9 kg |
| Sound Pressure Level (L_PA) | 90.5 dB(A) |
| Sound Power Level (L_WA) | 101.3 dB(A) |
| Vibration Emission Value (grinding) | 9.4 m/s² |
| Insulation | Double insulation (class II) |
| Main Functions | Grinding, sanding, wire brushing, polishing, cutting |
| Protection Guard | Type 27 (supplied) / Type 1 (option for cutting) |
| Side Handle | Anti-vibration, mount left or right |
| Switch | Slide switch with lock for continuous operation |
| Spindle Lock | Yes, for accessory change |
| Included Accessories | Guard, side handle, flange, lock nut, wrench, manual |
| Maintenance | Clean ventilation slots with compressed air, no lubrication required |
| Warranty | 1 year (subject to conditions) + 30-day satisfaction guarantee |
| Compliance Standards | CE, EN 60745-1, EN 60745-2-3, 2006/42/EC |
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USER MANUAL DWE4051 DEWALT
English (original instructions)
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Technical diagram of a mechanical assembly with labeled parts (i, j, m, b, f)
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Diagram of a hand operating a mechanical component with curved arrows indicating rotational direction (no text or symbols)Figure 3
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Technical line drawing of a mechanical device with labeled component 'g' (no text or symbols beyond label)Figure 4
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Figure 4 e n d bFigure 5
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Figure 5 A BFigure 6
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Line drawing of hands using a tool to grip a mechanical component (no text or symbols)VINKELSLIBER DWE4050, DWE4051
Tillykke!
RSEL: For at reducere
SKALAKONTAKT (FIG. 3)
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
| DWE4050 | DWE4051 | |||
| VoltageV230230U.K. & Ireland V 230/115 - | ||||
| Type | 2 | 2 | ||
| Power input | W | 800 | 800 | |
| No-load/rated speed | min^-1 | 11800 | 11800 | |
| Wheel diameter | mm 115 | 125 | ||
| Spindle diameter | M14 | M14 | ||
| Weight | kg | 1.8* | 1.9* | |
^ weight includes side handle and guard
| L_TA (sound pressure) | dB(A) | 90.5 | 90.5 |
| K_TA (sound pressure uncertainty) | dB(A) | 3.0 | 3.0 |
| L_TAA (sound power) | dB(A) | 101.3 | 101.3 |
| K_TAA (sound power uncertainty) | dB(A) | 3.0 | 3.0 |
Vibration total values (triax vector sum) determined according to EN 60745:
| Vibration emission value a_h surface grinding | |||
| a_h,AG = | m/s2 | 9.4 | 9.4 |
| Uncertainty K = | m/s2 | 1.5 | 1.5 |
| Vibration emission value a_h disc sanding | |||
| a_h,DS = | m/s2 | 7.5 | 7.5 |
| Uncertainty K = | m/s2 | 1.5 | 1.5 |
| Vibration emission value a_h polishing | |||
| a_h,P = | m/s2 | 6.6 | 6.6 |
| Uncertainty K = | m/s2 | 1.5 | 1.5 |
The vibration emission level given in this information sheet has been measured in accordance with a standardised test given in EN 60745 and may be used to compare one tool with another. It may be used for a preliminary assessment of exposure.
WARNING: The declared vibration 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 emission may differ. This may significantly increase the exposure level over the total working period.
An estimation of the level of exposure to vibration 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 such as: maintain the tool and the accessories, keep the hands warm, organisation of work patterns.
Fuses
| Europe | 230 V tools | 10 Amperes, mains |
| U.K. & Ireland | 230 V tools | 13 Amperes, in plugs |
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.
EC-Declaration of Conformity
MACHINERY DIRECTIVE
DWE4050, DWE4051
DEWALT declares that these products described under Technical Data are in compliance with: 2006/42/EC, EN 60745-1, EN 60745-2-3.
These products also comply with Directive 2004/108/EC 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.
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H. JopsmannHorst Grossmann
Vice President Engineering and
Product Development
DEWALT, Richard-Klinger-Strasse 11,
D-65510, Idstein, Germany
30.04.2012
WARNING: To reduce the risk of injury, read the instruction manual.
General Power Tool Safety Warnings
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE
The term "power tool" in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
1) WORK AREA SAFETY
a) Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b) Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
c) Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
2) ELECTRICAL SAFETY
a) Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
b) Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
c) Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
d) Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
e) When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
f) If operating a power tool in a damp location is unavoidable, use a 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 dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
c) Prevent unintentional starting. Ensure the switch is in the off position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energising power tools that have the switch on invites accidents.
ENGLISH
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, clothing and gloves 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 dust-related hazards.
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 the battery pack 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. 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.
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 Safety Instructions for All Operations
a) This power tool is intended to function as a grinder, sander, wire brush, polisher 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 serious injury.
b) 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.
c) 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.
d) 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.
e) The arbour size of wheels, flanges, backing pads or any other accessory must properly fit the spindle of the power tool. Accessories with arbour holes that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively and may cause loss of control.
f) 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 test time.
g) 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.
h) 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.
i) 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 electrical shock.
j) 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.
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.
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.
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 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 start up. 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.
ENGLISH
Safety Warnings Specific for Grinding and Abrasive Cutting-Off 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 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 ignite clothing.
c) Wheels must be used only for recommended 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 to shatter.
d) 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 wheel flanges.
e) 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 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 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 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 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 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.
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 Specifi c 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 Specifi c for Polishing Operations
a) Do not allow any loose portion of the polishing bonnet or its attachment strings to spin freely. Tuck away or trim any loose attachment strings. Loose and spinning attachment strings can entangle your fingers or snag on the workpiece.
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.
Additional Safety Rules for Grinders
- 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.
- The grinding surface of the 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.
- 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.
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.
Markings on Tool
The following pictograms are shown on the tool:
Read instruction manual before use.
Wear ear protection.
Wear eye protection.
DATE CODE POSITION (FIG. 1)
The date code (p), which also includes the year of manufacture, is printed into the housing.
Example:
2012 XX XX
Year of Manufacture
Package Contents
The package contains:
1 Angle grinder
1 Guard
1 Side handle
1 Flange set
1 Hex key
1 Instruction manual
1 Exploded drawing
- 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.
Description (fi g. 1)
VG: Never modify the power tool or any part of it. Damage or personal injury could result.
a. Spindle lock button
b. Spindle
c. Side handle
d. Backing flange
e. Threaded clamp nut
f. Guard
g. Slider switch
h. Guard release lever
INTENDED USE
The DWE4050, DWE4051 heavy-duty angle grinders have been designed for professional grinding, sanding, wire brushing, polishing and cutting applications.
DO NOT use grinding wheels other than centre depressed wheels and flap discs.
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.
- 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.
ENGLISH
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 EN 60745; 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 by a specially prepared cord available through the DEWALT 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.
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.
ASSEMBLY AND ADJUSTMENTS
NG: 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.
Attaching Side Handle (fi g. 1)
WARNING: Before using the tool, check that the handle is tightened securely.
Screw the side handle (c) 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.
Accessories and Attachments
It is important to choose the correct guards, backing pads and flanges to use with grinder accessories. Refer to chart at the end of this section for information on choosing the correct accessories.
NOTE: Edge grinding can be performed with Type 27 wheels designed and specified for this purpose.
WARNING: Accessories must be rated for at least the speed recommended on the tool warning label. Wheels and other accessories running over rated accessory speed may burst and cause injury. Threaded accessories must have a M14 hub. Every unthreaded accessory must have a 22 mm arbor hole. If it does not, it may have been designed for a circular saw and should not be used. Use only the accessories shown in the chart at the end of this section. Accessory ratings must be above listed minimum wheel speed as shown on tool nameplate.
Mounting Guards
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.
CAUTION: Guards must be used with this grinder.
When using the DWE4050 or the DWE4051 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 Chart at the end of this section to see other accessories that can be used with these grinders.
MOUNTING AND REMOVING (TYPE 27) ONE-TOUCH GUARD (FIG. 2A)
NOTE: If your grinder is supplied with a keyless One-Touch guard, ensure the screw, lever, and spring are fitted correctly before mounting the guard.
- Press the guard release lever (h).
- While holding the guard release lever open, align the lugs (i) on the guard with the slots on the gear case (j).
- Keeping the guard release lever open, push the guard down until the lugs engage then rotate them into the groove on the gear case hub. Release the guard release lever.
- With the spindle facing the operator, rotate the guard clockwise into the desired working position. The guard body should be positioned between the spindle and the operator to provide maximum operator protection.
- For easy adjustment, the guard can be rotated in the clockwise direction. NOTE: The guard release lever should snap into one of the alignment holes (k) on the guard collar. This ensures that the guard is secure. The guard can be repositioned the opposite direction by depressing the guard release lever.
- To remove the guard, follow steps 1–3 of these instructions in reverse.
GUARD WITH FIXING SCREW (FIG. 2B)
- Place the angle grinder on a table, spindle (b) up.
- Align the lugs (i) with the notches (j).
- Press the guard (f) down and rotate it to the required position.
- Securely tighten the screw (m).
- 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.
MOUNTING CLOSED (TYPE 1) GUARD
WARNING: If present, the One-Touch guard screw, lever, and spring must be removed before attempting to mount the closed (Type 1) guard. The removed parts must be retained and reinstalled to use the One-Touch guard. Noting the position of these parts before disassembly will aid in reassembly.
- Open the guard latch. Align the lugs (i) on the guard with the slots (j) on the gear case.
- Push the guard down until the guard lug engages and rotates freely in the groove on the gear case hub.
- Rotate guard into desired working position. The guard body should be positioned between the spindle and the operator to provide maximum operator protection.
- Close the guard latch to secure the guard on the gear case cover. You should be unable to rotate the guard by hand when the latch is in closed position. If rotation is possible, tighten the adjusting screw with the clamp lever in the closed position. Do not operate grinder with a loose guard or clamp lever in open position.
- To remove the guard, open the guard latch, rotate the guard so that the arrows are aligned and pull up on the guard.
NOTE: If, after a period of time the closed (Type 1) guard becomes loose, tighten the adjusting screw with the clamp lever in the closed position.
NOTICE: Do not tighten adjusting screw with clamp lever in open position. Undetectable damage to guard or mounting hub may result.
N: 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 authorized repair agent to repair or replace the guard.
Fitting and Removing a Grinding or Cutting Disc (fi g. 1, 4, 5)
VG: Do not use a damaged disc.
- Place the tool on a table, guard up.
- Fit the backing flange (d) correctly onto the spindle (b) (fig. 4).
- Place the disc (n) on the backing flange (d). When fitting a disc with a raised centre, make sure that the raised centre (l) is facing the backing flange (d).
- Screw the threaded clamp nut (e) onto the spindle (b) (fig. 5):
a. The ring on the threaded clamp nut (e) must face towards the disc when fitting a grinding disc (fig. 5A);
ENGLISH
b. The ring on the threaded clamp nut (e) must4. Place the sanding sheet on the rubber backing face away from the disc when fitting a cutting pad.
- Press the spindle lock button (a) and rotate the spindle (b) until it locks in position.
- Tighten the threaded clamp nut (e) with the hex key provided or a two pin spanner.
- Release the spindle lock.
- To remove the disc, loosen the threaded clamp nut (e) with the hex key provided or a two pin spanner.
NOTE: Edge grinding can be performed with Type 27 wheels designed and specified for this purpose; 6 mm thick wheels are designed for surface grinding while 3 mm wheels are designed for edge grinding. Cutting can be performed by using a Type 1 wheel and a Type 1 guard.
Mounting Wire Brushes and Wire Wheels
Wire cup brushes or wire wheels screw directly on the grinder spindle without the use of flanges. Use only wire brushes or wheels provided with a M14 threaded hub. A Type 27 guard is required when using wire brushes and wheels.
CAUTION: Wear work gloves when handling wire brushes and wheels. They can become sharp.
N: 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.
- Thread the wheel on the spindle by hand.
- Depress spindle lock button and use a wrench on the hub of the wire wheel or brush to tighten the wheel.
- To remove the wheel, reverse the above procedure.
NOTICE: Failure to properly seat the wheel hub before turning the tool on may result in damage to tool or wheel.
Fitting and Removing a Backing Pad/Sanding Sheet
- Place the tool on a table or flat surface, with the guard facing up.
- Remove the backing flange (d).
-
Place the rubber backing pad correctly onto the spindle (b).
-
Screw the threaded clamp nut (e) onto the spindle. The ring on the threaded clamp nut must face towards the rubber backing pad.
- Press the spindle lock button (a) and rotate the spindle (b) until it locks in position.
- Tighten the threaded clamp nut (e) with the hex key provided or a two pin spanner.
- Release the spindle lock.
- To remove the rubber backing pad, loosen the threaded clamp nut (e) with the hex key provided or a two pin spanner.
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 flanges are mounted correctly.
- Make sure the disc or wheel rotates in the direction of the arrows on the accessory and the tool.
OPERATION
Instructions for Use
VG: Always observe the safety instructions and applicable regulations.
NG: 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.
- 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.
- Apply only a gentle pressure to tool. Do not exert side pressure on the disc.
- Avoid overloading. Should the a become hot, let it run a few minutes under no load condition.
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 the continuous mode, press the rear part of the slider switch and release.
Spindle Lock (fi g. 1)
The spindle lock (a) 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.
Proper Hand Position (fi g. 1)
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 (c), with the other hand on the body of the tool, as shown in Figure 1.
Switches
CAUTION: Hold the side 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 tool down.
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 it down.
SLIDER SWITCH (FIG. 3)
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 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 power failure. If the slider switch is locked on when the power is connected, the tool will start unexpectedly.
To start the tool, slide the ON/OFF slider switch (g) toward the front of the tool. To stop the tool, release the ON/OFF slider switch.
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 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 build-up of metal swarf inside the machine, we recommend to clear the ventilation slots on a daily basis. Refer to Maintenance.
Using Flap Discs
WARNING: Metal dust build-up.
Extensive use of flap discs in metal applications can result in the 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 in accordance with the below maintenance instructions.
ENGLISH
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.
NG: 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.
Pop-off Brushes
The motor will be automatically shut off indicating that the carbon brushes are nearly worn out and that the tool needs servicing. The carbon brushes are not user-serviceable. Take the tool to an authorised DEWALT repair agent.
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 mask when performing this procedure.
VG: 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. This product must not be disposed of with normal household waste.
Should you find one day that your DEWALT product needs replacement, or if it is of no further use to you, do not dispose of it with household waste. Make this product available for separate collection.
Separate collection of used products and packaging allows materials to be recycled and used again. Re-use of recycled materials helps prevent environmental pollution and reduces the demand for raw materials.
Local regulations may provide for separate collection of electrical products from the household, at municipal waste sites or by the retailer when you purchase a new product.
DEWALT provides a facility for the collection and recycling of DEWALT products once they have reached the end of their working life. To take advantage of this service please return your product to any authorised repair agent who will collect them on our behalf.
You can check the location of your nearest authorised repair agent by contacting your local DEWALT office at the address indicated in this manual. Alternatively, a list of authorised DEWALT repair agents and full details of our after-sales service and contacts are available on the Internet at: www.2helpU.com.
GUARANTEE
DEWALT is confident of the quality of its products and offers an outstanding guarantee for professional users of the product. This guarantee statement is in addition to and in no way prejudices your contractual rights as a professional user or your statutory rights as a private non-professional user. The guarantee is valid within the territories of the Member States of the European Union and the European Free Trade Area.
• 30 DAY NO RISK SATISFACTION GUARANTEE •
If you are not completely satisfied with the performance of your DEWALT tool, simply return it within 30 days, complete with all original components, as purchased, to the point of purchase, for a full refund or exchange. The product must have been subject to fair wear and tear and proof of purchase must be produced.
• ONE YEAR FREE SERVICE CONTRACT •
If you need maintenance or service for your DEWALT tool, in the 12 months following purchase, you are entitled to one service free of charge. It will be undertaken free of charge at an authorised DEWALT repair agent. Proof of purchase must be produced. Includes labour. Excludes accessories and spare parts unless failed under warranty.
• ONE YEAR FULL WARRANTY •
If your DEWALT product becomes defective due to faulty materials or workmanship within 12 months from the date of purchase, DEWALT guarantees to replace all defective parts free of charge or – at our discretion – replace the unit free of charge provided that:
• The product has not been misused;
- The product has been subject to fair wear and tear;
• Repairs have not been attempted by unauthorised persons;
• Proof of purchase is produced;
- The product is returned complete with all original components.
If you wish to make a claim, contact your seller or check the location of your nearest authorised DEWALT repair agent in the DEWALT catalogue or contact your DEWALT office at the address indicated in this manual. A list of authorised DEWALT repair agents and full details of our after-sales service is available on the Internet at: www.2helpU.com.
ENGLISH
| GRINDING AND CUTTING ACCESSORY CHART | |||
| Guard Type Accessory Description How to Fit Grinder | |||
 TYPE 27GUARD |  | Depressedcentre grindingdisc |  Type 27 guard Backing flange Type 27 depressedcentre wheelThreaded clamp nut |
 | Flap wheel | ||
 | Wire wheels | ||
 | Wire wheelswith threadednut |  Type 27 guard Wire wheel | |
 | Wire cup withthreaded nut |  Type 27 guard Wire brush | |
 | Backing pad/sanding sheet |  Type 27 guard Rubber backing pad Sanding disc Threaded clamp nut | |
| GRINDING AND CUTTING ACCESSORY CHART (cont.) | |||
| Guard Type Accessory Description How to Fit Grinder | |||
 TYPE 1 GUARD |  | Masonry cutting disc, bonded |  Type 1 guard |
 | Metal cutting disc, bonded |  Backing flange | |
 TYPE 1 GUARDOR TYPE 27 GUARD |  | Diamond cutting wheels |  Cutting wheel Threaded clamp nut |
| NO GUARD |  | Polishing bonnet |  |
ESPAÑOL
AMOLADORAS ANGULARES DWE4050, DWE4051
¡Enhorabuena!
Vice President Engineering and Product Development
DEWALT, Richard-Klinger-Straße 11, D-65510, Idstein, Duitsland 30.04.2012
