Bosch GBH 7-45 DE Instructions D'emploi page 13

Overload Clutch
If the drill becomes caught or jammed, the
drive to the drill spindle is interrupted.
Because of the forces that occur as a result,
always hold the machine securely with both
hands and take a firm stance.
Speed/Impact Rate and Impact
Force Selection
The regulating electronics make possible the con-
tinuous setting of a speed/impact rate and impact
force that is suited to the material to be worked.
The adjustment takes place with the thumb-
wheel 6.
The "Constant Electronics" hold the selected
speed/impact rate/impact force nearly constant
and ensures uniform working performance.
Select the speed/impact rate/impact force appro-
priate for the material to be worked.
The values in the table are recommendations.
Position "Drilling"
Adjust- Rotational
ment Knob Speed
Position 6 (RPM)
1 135
2 165
3 196
4 215
5 245
6 270
1 619 929 512 • TMS • 15.09.00
"Chiselling"
Impact Impact
Rate Rate
(/min) (/min)
1 300 1 350
1 580 1 650
1 865 1 950
2 060 2 240
2 345 2 580
2 600 2 800
English - 3
Mode Selector Switch
Operate the mode selector switch 3 only at
a standstill.
Set the mode selector switch 3 to the desired po-
sition.
Hammer Drilling
Vario-Lock
(Change chisel position)
Chiselling (Rotation OFF)
Booster
In the "Chiselling" position, the selected impact
rate is automatically increased when the machine
is switched on. In this manner, the machine pro-
vides higher performance for chiselling work.
Chiselling position (Vario-Lock)
Operate the mode selector switch 3 only at
a standstill.
The chisel can be locked in 12 positions. In this
manner, the optimum working position can be set
for each application.
Insert the chisel in the tool holder.
Set the mode selector switch 3 in the "Vario-
Lock" position.
Turn the tool holder to the desired chiselling posi-
tion.
Allow the mode selector 3 switch to latch again in
the "Chiselling" position. Then turn the chisel
somewhat to the right and left until it latches. The
tool holder is locked in this position.
The mode selector switch 3 must always be in
the "Chiselling" position for chiselling.