Bosch GBH 7-45 DE - Overload Clutch; Speed;Impact Rate and Impact Force Selection; Mode Selector Switch Operation; Hammer Drilling Mode

English - 3
1 619 929 512 • TMS • 15.09.00
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.
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.
■ 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.
■ 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.
Overload Clutch
Speed/Impact Rate and Impact
Force Selection
Position “Drilling” “Chiselling”
Adjust-
ment Knob
Position 6
Rotational
Speed
(RPM)
Impact
Rate
(/min)
Impact
Rate
(/min)
1 135 1 300 1 350
2 165 1 580 1 650
3 196 1 865 1 950
4 215 2 060 2 240
5 245 2 345 2 580
6 270 2 600 2 800
Mode Selector Switch
Chiselling position (Vario-Lock)