12 | English
1 609 929 V36 | (4.10.10) Bosch Power Tools
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 select-
ed with the mode selector switch 5.
Note: Change the operating mode only when the
machine is switched off! Otherwise, the ma-
chine can be damaged.
– Turn the mode selector switch 5 to the re-
quested position.
Reversing the Rotational Direction
f Actuate the rotational direction switch 8
only when the machine is at a standstill.
The rotational direction switch 8 is used to re-
verse the rotational direction of the machine.
Right rotation: Turn the rotational direction
switch 8 to the stop in the position .
Left rotation: Turn the rotational direction
switch 8 to the stop in the position .
Set the direction of rotation for hammer drilling,
drilling and chiselling always to right rotation.
Switching On and Off
–To start the machine, press the On/Off
switch 7 and keep it pressed.
– To switch off the machine, release the
On/Off switch 7.
For low temperatures, the power tool reaches
the full hammer/impact capacity only after a cer-
tain time.
Setting the Speed/Impact Rate
The speed/impact rate of the switched on pow-
er tool can be variably adjusted, depending on
how far the On/Off switch 7 is pressed.
Light pressure on the On/Off switch 7 results in
low speed/impact rate. Further pressure on the
switch increases the speed/impact rate.
Safety Clutch
f 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.
f If the power tool jams, switch the machine
off and loosen the tool insert. When switch-
ing the machine on with the drilling tool
jammed, high reaction torques can occur.
Position for drilling
without impact in wood,
metal, ceramic and
plastic as well as for
screwdriving
Position for hammer
drilling in concrete or
stone
When the drilling tool
does not immediately ro-
tate upon switching on,
allow the machine to run
slowly until the drilling
tool rotates.
Vario-Lock position for
adjustment of the
chiselling position
Position for chiselling
OBJ_BUCH-411-006.book Page 12 Monday, October 4, 2010 10:22 AM
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