Bosch GGS 28 C Professional: English

OBJ_BUCH-1269-004.book Page 12 Tuesday, May 17, 2011 4:15 PM

12 | English

f The rated speed of the accessory must be at least equal

piece allows you to use both hands to control the tool.

to the maximum speed marked on the power tool. Ac-

Round material such as dowel rods, pipes or tubing have a

cessories running faster than their rated speed can break

tendency to roll while being cut, and may cause the bit to

and fly apart.

bind or jump toward you.

f The outside diameter and the thickness of your acces-

f Position the cord clear of the spinning accessory. If you

sory must be within the capacity rating of your power

lose control of the power tool, the cord may be cut or

tool. Incorrectly sized accessories cannot be adequately

snagged and your hand or arm may be pulled into the spin-

controlled.

ning accessory.

f The arbour size of wheels, sanding drum or any other

f Never lay the power tool down until the accessory has

accessory must properly fit the spindle or collet of the

come to a complete stop. The spinning accessory may

power tool. Accessories that do not match the mounting

grab the surface and pull the power tool out of your control.

hardware of the power tool will run out of balance, vibrate

f After changing the bits or making any adjustments,

excessively and may cause loss of control.

make sure the collet nut, chuck or any other adjust-

f Mandrel mounted wheels, sanding drums, cutters or

ment devices are securely tightened. Loose adjustment

other accessories must be fully inserted into the collet

devices can unexpectedly shift, causing loss of control,

or chuck. The “overhang” or the length of the mandrel

loose rotating components will be violently thrown.

from the wheel to the collet must be minimal. If the man-

f Do not run the power tool while carrying it at your side.

drel is insufficiently held and/or the overhang of the wheel

Accidental contact with the spinning accessory could snag

is too long, the mounted wheel may become loose and

your clothing, pulling the accessory into your body.

ejected at high velocity.

f Regularly clean the power tool’s air vents. The motor’s

f Do not use a damaged accessory. Before each use in-

fan will draw the dust inside the housing and excessive ac-

spect the accessory such as abrasive wheels for chips

cumulation of powdered metal may cause electrical haz-

and cracks, sanding drum for cracks, tear or excess

ards.

wear, wire brush for loose or cracked wires. If power

f Do not operate the power tool near flammable materi-

tool or accessory is dropped, inspect for damage or in-

als. Sparks could ignite these materials.

stall an undamaged accessory. After inspecting and in-

stalling an accessory, position yourself and bystanders

f Do not use accessories that require liquid coolants. Us-

away from the plane of the rotating accessory and run

ing water or other liquid coolants may result in electrocu-

the power tool at maximum no-load speed for one

tion or shock.

minute. Damaged accessories will normally break apart

Kickback and related warnings

during this test time.

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

f Wear personal protective equipment. Depending on

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

application, use face shield, safety goggles or safety

Pinching or snagging causes rapid stalling of the rotating

glasses. As appropriate, wear dust mask, hearing pro-

accessory which in turn causes the uncontrolled power

tectors, gloves and workshop apron capable of stop-

tool to be forced in the direction opposite of the accesso-

ping small abrasive or workpiece fragments. The eye

ry’s rotation at the point of the binding.

protection must be capable of stopping flying debris gen-

For example, if an abrasive wheel is snagged or pinched by

erated by various operations. The dust mask or respirator

the workpiece, the edge of the wheel that is entering into

must be capable of filtrating particles generated by your

the pinch point can dig into the surface of the material

operation. Prolonged exposure to high intensity noise may

causing the wheel to climb out or kick out. The wheel may

cause hearing loss.

either jump toward or away from the operator, depending

f Keep bystanders a safe distance away from work area.

on direction of the wheel’s movement at the point of pinch-

Anyone entering the work area must wear personal

ing. Abrasive wheels may also break under these condi-

protective equipment. Fragments of workpiece or of a

tions.

broken accessory may fly away and cause injury beyond

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

immediate area of operation.

rect operating procedures or conditions and can be avoid-

ed by taking proper precautions as given below.

f Hold power tool by insulated gripping surfaces only,

when performing an operation where the cutting ac-

f Maintain a firm grip on the power tool and position your

cessory may contact hidden wiring or its own cord. Cut-

body and arm to allow you to resist kickback forces.

ting accessory contacting a “live” wire may make exposed

The operator can control kickback forces, if proper precau-

metal parts of the power tool “live” and could give the op-

tions are taken.

erator an electric shock.

f Use special care when working corners, sharp edges,

f Always hold the tool firmly during the start-up. The re-

etc. Avoid bouncing and snagging the accessory. Cor-

action torque of the motor, as it accelerates to full speed,

ners, sharp edges or bouncing have a tendency to snag the

can cause the tool to twist.

rotating accessory and cause loss of control or kickback.

f Use clamps to support workpiece whenever practical.

f Do not attach a thin toothed saw blade. Such blades cre-

Never hold a small workpiece in one hand and the tool

ate frequent kickback and loss of control.

in the other hand while in use. Clamping a small work-

3 609 929 C06 | (17.5.11) Bosch Power Tools