Manual DeWalt DWE4257 (page 39 of 204) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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ENGLISH

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.

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 grinding surface of centre depressed wheels

must be mounted below the plane of the guard lip.

An improperly mounted wheel that projects through the

plane of the guard lip cannot be adequatelyprotected.

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 igniteclothing.

d ) 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.

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 wheelflanges.

f ) Do not use worn down wheels from larger power

tools. Wheel intended for larger power tool is not suitable

for the higher speed of a smaller tool and mayburst.

Additional Safety Warnings Specific for

Abrasive 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 re-enter 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 Specific for Sanding

Operations

a ) Do not use excessively oversized sanding disc

paper. Follow manufacturer’s recommendations,

when selecting sanding paper. Larger sanding paper

extending beyond the sanding pad presents a laceration

hazard and may cause snagging, tearing of the disc

orkickback.

Safety Warnings Specific for Wire Brushing

Operations

a ) Be aware that wire bristles are thrown by the brush

even during ordinary operation. Do not overstress

the wires by applying excessive load to the brush.

The wire bristles can easily penetrate llight clothing and/

orskin.

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DeWalt DWE4257 Manual

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