Working Instructions; Maintenance And Service; Maintenance And Cleaning - Bosch GSR Professional Serie Notice Originale

OBJ_BUCH-720-001.book Page 11 Monday, May 5, 2008 8:55 AM
Left Rotation: For loosening or unscrewing
screws, push the rotational direction switch 7
right to the stop.
Setting the Torque
With the torque presetting ring 2 the required
torque setting can be preselected in 20 steps.
With the correct setting, the insert tool is
stopped as soon as the screw is screwed flush in-
to the material or when the adjusted torque is
reached. The safety clutch is deactivated in the
" " position, e. g. for drilling.
Select a higher setting or switch to the
" " symbol when unscrewing screws.
Gear Selection, Mechanical
Actuate the gear selection lever 3 only when
the machine is at a complete standstill.
Two speed ranges can be preselected with the
gear selection lever 3.
Gear I:
Low speed range; for screwdriving or working
with large drilling diameter.
Gear II:
High speed range; for working with small drilling
diameter.
If the gear selector 3 cannot be pushed through
to the stop, lightly turn the drill chuck.
Switching On and Off
To start the power tool, press the On/Off switch
8 and keep it pressed.
To switch off the power tool, release the On/Off
switch 8.
Adjusting the Speed
The speed of the switched on power tool can be
variably adjusted, depending on how far the
On/Off switch 8 is pressed.
Light pressure on the On/Off switch 8 results in
a low rotational speed. Further pressure on the
switch results in an increase in speed.
Fully Automatic Spindle Locking (Auto-lock)
When the On/Off switch 8 is not pressed, the
drill spindle and thus the tool holder are locked.
Bosch Power Tools
This enables screws to be screwed in, even when
the battery is empty and allows for the tool to be
used as a screwdriver.
Run-on Brake
When the On/Off switch 8 is released, the chuck
brakes to a stop, thus preventing the run-on of
the tool.
When driving in screws, wait until the screw is
screwed in flush with the material and then re-
lease the On/Off switch 8. By doing so, the head
of the screw does not penetrate into the materi-
al.

Working Instructions

Apply the power tool to the screw only when
it is switched off. Rotating tool inserts can
slip off.
Tips
After longer periods of working at low speed, al-
low the machine to cool down by running it for
approx. 3 minutes at maximum speed with no
load.
For drilling in metal, use only perfectly sharp-
ened HSS drill bits (HSS = High Speed Steel).
The appropriate quality is guaranteed by the
Bosch accessories program.
Before screwing larger, longer screws into hard
materials, it is advisable to predrill a pilot hole
with the core diameter of the thread to approx.
2
/ of the screw length.
3

Maintenance and Service

Maintenance and Cleaning

Before any work on the power tool (e. g.,
maintenance, tool change, etc.) as well as
during transport and storage, set the rota-
tional direction switch to the center posi-
tion. Unintentional actuation of the On/Off
switch can lead to injuries.
For safe and proper working, always keep
the power tool and the ventilation slots
clean.
English | 11
1 609 929 R34 | (5.5.08)