Manual Bosch GWS 9-125 S (page 17 of 303) (All languages)

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Kickback and Related Warnings

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

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

ing or snagging causes rapid stalling of the rotating access-

ory 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 direc-

tion of the wheel’s movement at the point of pinching. Abras-

ive 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.

uMaintain 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 reac-

tions or kickback forces, if proper precautions are taken.

uNever place your hand near the rotating accessory.

Accessory may kickback over your hand.

uDo 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.

uUse 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.

uDo not attach a saw chain woodcarving blade or

toothed saw blade. Such blades create frequent kick-

back and loss of control.

Safety Warnings specific for Grinding and Abrasive

Cutting-Off operations

uUse 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

designed cannot be adequately guarded and are unsafe.

uThe grinding surface of centre depressed wheels must

be mounted below the plane of the guard lip. An im-

properly mounted wheel that projects through the plane

of the guard lip cannot be adequately protected.

uThe 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

fragments, accidental contact with wheel and sparks that

could ignite clothing.

uWheels must be used only for recommended applica-

tions. For example: do not grind with the side of cut-

off wheel. Abrasive cut-off wheels are intended for peri-

pheral grinding, side forces applied to these wheels may

cause them to shatter.

uAlways 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 pos-

sibility of wheel breakage. Flanges for cut-off wheels may

be different from grinding wheel flanges.

uDo not use worn down wheels from larger power

tools. Wheel intended for larger power tool is not suit-

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

Additional Safety Warnings specific for Abrasive Cutting

Off operations

uDo 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.

uDo not position your body in line with and behind the

rotating wheel. When the wheel, at the point of opera-

tion, is moving away from your body, the possible kick-

back may propel the spinning wheel and the power tool

directly at you.

uWhen 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 com-

plete 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 ac-

tion to eliminate the cause of wheel binding.

uDo 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.

uSupport panels or any oversized workpiece to minim-

ize 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.

uUse 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

uDo not use excessively oversized sanding disc paper.

Follow manufacturers recommendations, when select-

ing sanding paper. Larger sanding paper extending bey-

ond the sanding pad presents a laceration hazard and

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

Safety Warnings specific for Wire Brushing operations

uBe 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.

Bosch Power Tools 1 609 92A 6KB | (25.06.2021)

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Bosch GWS 9-125 S Manual

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