Bosch GGS 28 CE - Инструкция по эксплуатации - Страница 18

18

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3 609 929 C06 | (16.12.10)

Bosch Power Tools

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 caus-
ing 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 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.

f

Maintain a firm grip on the power tool and 
position your body and arm to allow you to 
resist kickback forces. 

The operator can 

control kickback forces, if proper precau-
tions are taken.

f

Use special care when working corners, 
sharp edges, etc. Avoid bouncing and snag-
ging the accessory. 

Corners, sharp edges or 

bouncing have a tendency to snag the rotat-
ing accessory and cause loss of control or 
kickback.

f

Do not attach a thin toothed saw blade. 

Such blades create frequent kickback and 
loss of control.

f

Always feed the bit into the material in the 
same direction as the cutting edge is exiting 
from the material (which is the same direc-
tion as the chips are thrown). 

Feeding the 

tool in the wrong direction causes the cutting 
edge of the bit to climb out of the work and 
pull the tool in the direction of this feed.

f

When using cut-off wheels, high-speed cut-
ters or tungsten carbide cutters, always 
have the work securely clamped. 

These 

wheels will grab if they become slightly cant-
ed in the groove, and can kickback. When a 
cut-off wheel grabs, the wheel itself usually 
breaks. When the steel saw, high-speed cut-
ters or tungsten carbide cutter grab, it may 
jump from the groove and you could lose 
control of the tool.

Additional safety instructions for grinding

f

Use only wheel types that are recommend-
ed for your power tool and only for recom-
mended applications. For example: do not 
grind with the side of a cut-off wheel. 

Abra-

sive cut-off wheels are intended for peripher-
al grinding, side forces applied to these 
wheels may cause them to shatter.

f

For threaded abrasive cones and plugs use 
only undamaged wheel mandrels with an 
unrelieved shoulder flange that are of cor-
rect size and length. 

Proper mandrels will re-

duce the possibility of breakage.

f

Do not “jam” the cut-off wheel or apply ex-
cessive pressure. Do not attempt to make 
an excessive depth of cut. 

Overstressing the 

wheel increases the loading and susceptibili-
ty to twisting or binding of the wheel in the 
cut and the possibility of kickback or wheel 
breakage.

f

Do not position your hand in line with and 
behind the rotating wheel. 

When the wheel, 

at the point of operation, is moving away 
from your hand, 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 power tool motionless un-
til the wheel comes to a complete stop. Nev-
er attempt to remove the cut-off wheel from 
the cut while the wheel is in motion other-
wise kickback may occur. 

Investigate and 

take corrective action to eliminate the cause 
of wheel binding.

f

Do not restart the cutting operation in the 
workpiece. Let the wheel reach full speed 
and carefully reenter 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 workpieces tend to sag un-

der 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.

OBJ_BUCH-1269-003.book  Page 18  Thursday, December 16, 2010  4:05 PM