Bosch PROFESSIONAL GBH 7-46 DE Instructions D'emploi page 7

Switching On/Off in chiseling mode
I
0
For starting operation of the machine, press the
On/Off switch 4 from above until it latches (I).
For switching off the machine, press the On/Off
switch 4 to the bottom (0) and release.
For low temperatures,
reaches the full hammer/impact perfor-
mance only after a certain time.
This start-up time can be shortened by
striking the drill/chisel against the floor one
time.
Speed/Impact Rate and
Impact Force Selection
The regulating electronics make possible the
continuous setting of a speed/impact rate and
impact force that is suited to the material to be
worked. The adjustment takes place with the
thumbwheel 5.
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 ap-
propriate for the material to be worked.
The values in the Table are recommendations.
Position
Adjust- Rotational
ment Knob Speed
Position 5 (rpm)
1 145
2 170
3 200
4 225
5 255
6 280
7 • 1 619 929 670 • 04.07
All manuals and user guides at all-guides.com
the machine
"Drilling" "Chiseling"
Impact Impact
Rate Rate
(bpm) (bpm)
1 350 1 375
1 625 1 650
1 975 2 025
2 175 2 225
2 475 2 550
2 700 2 800
English - 4
Mode Selector Switch
Operate the mode selector switch 3 only
when the machine is at a standstill.
Set the mode selector switch 3 to the required
position.
Hammer drilling
Changing the Chiseling
Position (Vario lock)
Chiseling (Rotation Off)
Booster
In the "Chiseling" position, the selected impact
rate is automatically increased when the machine
is switched on. In this manner, the machine pro-
vides higher performance for chiseling work.
Overload Clutch
If the tool insert becomes caught or
jammed, the drive to the drill spindle is in-
terrupted.
Because of the forces that occur, always hold
the power tool firmly with both hands and
provide for a secure stance.
If the drilling tool jams, switch the machine off and
loosen the drilling tool. When a machine that has
a jammed drilling tool is switched on, strong reac-
tion torques can occur!