1 619 929 754 | (27.7.07)
Bosch Power Tools
18
| English
f
A damaged dust protection cap should be
changed immediately. We recommend hav-
ing this carried out by an after-sales service.
Inserting (see figure A)
Clean and lightly grease the shank end of the
tool.
Insert the tool in a twisting manner into the tool
holder until it latches itself.
Check the latching by pulling the tool.
Removing (see figure B)
Push back the locking sleeve
2
and remove the
tool.
Operation
Starting Operation
f
Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V can
also be operated with 220 V.
Setting the Operating Mode
The operating mode of the power tool is selected
with the mode selector switch
4
.
Note:
Change the operating mode only when the
machine is switched off! Otherwise, the machine
can be damaged.
Press and hold the unlocking button
3
and turn
the mode selector switch
4
to the required posi-
tion.
Switching On and Off
To
start
the machine, press the On/Off switch
5
and keep it depressed.
To switch off the machine,
release
the On/Off
switch
5
.
For low temperatures, the machine reaches the
full hammer/impact capacity only after a certain
time.
This start-up time can be shortened by striking
the inserted tool insert against the floor one
time.
Setting the Speed/Impact Rate
The electronic control enables stepless speed
and impact preselection in accordance with the
material to be worked.
The constant electronic control keeps the prese-
lected speed and impact rate nearly constant be-
tween no-load and load conditions.
The maximum hammering capacity is achieved
when the thumbwheel
6
is set to position “6”.
For lower speed settings, the hammering capaci-
ty is lower due to technical reasons.
Select the speed with the thumbwheel
6
accord-
ing to the material.
The data in the following table are recommended
values.
Position for
hammer drilling
When the drilling tool does not
immediately rotate upon
switching on, allow the ma-
chine to run slowly until the
drilling tool rotates.
Vario-Lock
position for adjust-
ment of the chiselling position
Position for
chiselling
Operating
Mode
Hammer Drilling
Chiselling
Thumb-
wheel
6
Rated
Speed
(rpm)
Impact
Rate
(bpm)
Impact
Rate
(bpm)
1
135
1240
1240
2
157
1440
1440
3
184
1680
1680
4
204
1880
1880
5
228
2080
2080
6
252
2300
2300
OBJ_BUCH-58-002.book Page 18 Friday, July 27, 2007 10:11 AM
