Bedienungsanleitung Bosch GWS 15-150 CIP (Seite 13 von 271) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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English | 13

Bosch Power Tools 1 609 92A 0ED | (26.8.13)

Kickback and related warnings

 Kickback is a sudden reaction to a pinched or snagged rotat-

ing wheel, backing pad, brush or any other accessory.

Pinching or snagging causes rapid stalling of the rotating ac-

cessory which in turn causes the uncontrolled power tool to

be forced in the direction opposite of the accessory’s rota-

tion 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 di-

rection 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. Al-

ways use auxiliary handle, if provided, for maximum

control over kickback or torque reaction during

start-up. The operator can control torque reactions or

kickback forces, if proper precautions are taken.

 Never place your hand near the rotating accessory. Ac-

cessory may kickback over your hand.

 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.

 Use special care when working corners, sharp edges,

etc. Avoid bouncing and snagging the accessory. Cor-

ners, 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 Abra-

sive Cutting-Off operations

 Use only wheel types that are recommended for your

power tool and the specific guard designed for the se-

lected wheel. Wheels for which the power tool was not de-

signed cannot be adequately guarded and are unsafe.

 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.

 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 operator from broken wheel frag-

ments, accidental contact with wheel and sparks that

could ignite clothing.

 Wheels must be used only for recommended applica-

tions. 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 cor-

rect size and shape for your selected wheel. Proper

wheel flanges support the wheel thus reducing the possi-

bility of wheel breakage. Flanges for cut-off wheels may be

different from grinding wheel flanges.

 Do not use worn down reinforced wheels from larger

power tools. Wheels intended for larger power tools are 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 pres-

sure. Do not attempt to make an excessive depth of cut.

Overstressing the wheel increases the loading and suscep-

tibility to twisting or binding of the wheel in the cut and the

possibility of kickback or wheel breakage.

 Do not position your body in line with and behind the ro-

tating wheel. When the wheel, at the point of operation, is

moving away from your body, the possible kickback may

propel the spinning wheel and the power tool directly at you.

 When wheel is binding or when interrupting a cut for

any reason, switch off the power tool and hold the pow-

er 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 elimi-

nate the cause of wheel binding.

 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.

 Support panels or any oversized workpiece to minimize

the risk of wheel pinching and kickback. Large work-

pieces 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” into ex-

isting 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 manufacturers recommendations, when select-

ing sanding paper. Larger sanding paper extending be-

yond the sanding pad presents a laceration hazard and

may cause snagging, tearing of the disc, or kickback.

Safety warnings specific for wire brushing

operations

 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.

 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 load and centrifugal forces.

OBJ_BUCH-1660-005.book Page 13 Monday, August 26, 2013 3:30 PM

Bosch GWS 15-150 CIP Seite 13

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