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English | 13

Bosch Power Tools 1 609 929 Y28 | (8.9.11)

Kickback and related warnings

f Kickback is a sudden reaction to a pinched or snagged ro-

tating 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 accesso-

ry’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 pinch-

ing. Abrasive wheels may also break under these condi-

tions.

Kickback is the result of power tool misuse and/or incor-

rect operating procedures or conditions and can be avoid-

ed by taking proper precautions as given below.

f 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.

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

cessory may kickback over your hand.

f 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.

f 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.

f Do not attach a saw chain woodcarving blade or

toothed saw blade. Such blades create frequent kickback

and loss of control over the power tool.

Safety warnings specific for Grinding and

Abrasive Cutting-Off operations

f 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.

f 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.

f 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.

f 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.

f Do not use worn down 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

f 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.

f Do not position your body in line with and behind the

rotating 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.

f 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.

f 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.

f 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.

f 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

f 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

f 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.

f 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-1425-003.book Page 13 Thursday, September 8, 2011 4:07 PM

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OBJ BUCH 1425 003 book Page 13 Thuisday Septembers 2011 4 07 PM English 13 Kickback and related warnings Kickback is a sudden reaction to apinched or snagged ro tating 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 accesso ry s rotation at the point of the binding For example if an abrasivewheel is snagged or pinched by 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 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 the workpiece the edge of the wheel that is entering into cutting off operations the pinch point can dig into thesurface of the material causing the wheel to climb out or kick out The wheel may Do not ja m the cut off wheel or a pply excessive pres sure Do not attempt to makean excessive depth of cut either jump toward or away from the operator depending Overstressing on direction of the wheel s movement at the point of pinch tibility to twisting or binding of the wheel in thecut and the ing Abrasive wheels may also break under these condi tions Kickback is the result of power tool misuse and or incor thewheel increases theloadingandsuscep possibility of kickback or wheel breakage Do not position your body in line with and behind the rotating wheel When the wheel at thepoint of operation rect operating procedures or conditions and can be avoid is moving away from your body the possible kickback may ed by taking proper precautions as given below propel the spinning wheel and the power tool directly at Ma intain a firm grip on the power tool a nd position your body andarmtoallow you to resist kickback forces Al you When wheel is binding or when interrupting a cut for ways useauxiliary handle if provided for maximum any rea son switch off the power tool a nd hold the pow control over kickback or torque reaction during er tool motionless until the wheel comes to a complete start up The operator can control torque reactions or kickback forces if proper precautions are taken stop Never attempt to remove the cut off wheel from the cut while the wheel is in motion otherwi se kickback Never place your ha nd near the rota ting a ccessory Ac cessory may ki ckback over your hand Donotpositionyourbody inthearea 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 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 Thewheel may bind walk up or kickback if the power tool is restarted in the workpiece Support panels or any oversized workpieceto minimize etc Avoid bouncing and snagging theaccessory Cor the risk of wheel pinching and kickback Large work ners sharp edges or bouncing havea tendency tosnag the rotating accessory and cause loss of control or kickback pieces tend to sag under their own weight Supports must be placed under theworkpiecenear thelineofcutand near Do not attach a saw chain woodcarving blade or toothed saw blade Such blades create frequent kickback and loss of control over the power tool Safety warnings specific for Grinding and the edge of the workpiece on both si des 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 pi pes el ectrical wiri ng or objects that can cause kickback Abrasive 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 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 gri ndi ng si de forces appli ed to these wheels may cause them to shatter Always use undamaged wheel flanges thatareof cor rect size and shapeforyour selected wheel Proper Bosch Power Tools 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 excessiveloadtothe brush Thewire bristles can easily penetrate light clothing and or skin If the use of a gua rd is recommended for wire brushi ng do not allow any interference of the wire wheel or brushwith theguard Wire wheel orbrushmay expand in diameter due to work load and centrifugal forces 1 609929 Y 281 8 9 11

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