Practical Advice - Bosch Professional GSR 12V-30 Manual Original

Setting the Operating Mode
Drilling
GSR 12V-30:
Set the torque selector setting ring (3) to the
"drilling" symbol.
GSB 12V-30:
Set the mode selector switch (4) to the
"drilling" symbol.
Screwdriving
GSR 12V-30:
Set the torque selector setting ring (3) to the
required torque.
GSB 12V-30:
Set the mode selector switch (4) to the "screw-
driving" symbol.
Set the torque selector setting ring (3) to the
required torque.
Impact drilling
GSB 12V-30:
Set the mode selector switch (4) to the "impact
drilling" symbol.
Preselecting the Torque
The torque presetting ring (3) can be used to preselect the
required torque in 20 stages. When the correct setting is
used, the application tool will be stopped when the screw is
driven flush into the material or once the set torque has been
reached. In position the overload clutch is deactivated,
e.g. for drilling.
When unscrewing screws, you can select a higher setting or
set the tool to the symbol.
Mechanical gear selection
Only operate the gear selector (5) when the power
u
tool is not in use.
You can preselect two speed ranges with the gear selector
(5).
Gear I:
Low speed range; for screwdriving or working with a large
drilling diameter.
Gear II:
High speed range; for working with a small drilling diameter.
If the gear selector switch (5) cannot be pushed all the way,
turn the tool holder (1) with the application tool slightly.
Switching on/off
To start the power tool, press and hold the on/off switch
(10).
The lamp (12) lights up when the on/off switch (10) is lightly
or fully pressed, meaning that the work area is illuminated in
poor lighting conditions.
To switch off the power tool, release the on/off switch (10).
Bosch Power Tools
Adjusting the Speed
You can adjust the speed of the power tool when it is on by
pressing in the on/off switch (10) to varying extents.
A light pressure on the on/off switch (10) results in a low ro-
tational speed. Increased pressure on the switch causes an
increase in speed.
Setting the speed/impact rate (GSB 12V-30)
You can adjust the speed/impact rate of the power tool when
it is on by pressing in the on/off switch (10) to varying ex-
tents.
Applying light pressure to the on/off switch (10) results in a
low rotational speed/impact rate. Applying increasing pres-
sure to the switch increases the speed/impact rate.
Fully automatic spindle lock (Auto-Lock)
The drill spindle, and therefore the tool holder, are locked
when the on/off switch (10) is not pressed.
This allows screws to be driven in even when the battery is
discharged and enables the power tool to be used as a
screwdriver.
Run-out brake
Upon releasing the on/off switch (10), the drill chuck is
slowed down, which prevents the application tool from con-
tinuing to rotate.
When driving in screws, you should therefore only release
the on/off switch (10) once the screw has been inserted
flush into the workpiece. This way, the head of screw will not
penetrate the workpiece.
Battery charge-control indicator
When the on/off switch (10) is pressed in halfway or com-
pletely, the battery charge-control indicator (11) indicates
the charge condition of the battery for several seconds. The
indicator consists of three green LEDs.
LED
Continuous lighting 3 x green
Continuous lighting 2 x green
Continuous lighting 1 x green
Flashing light 1 x green
Temperature-dependent overload protection
In normal conditions of use, the power tool cannot be over-
loaded. In the event of heaving loading or the temperature
rising/falling outside the permitted battery temperature
range, the speed will be reduced. The power tool will not run
at full speed again until the permitted battery temperature
has been reached.

Practical advice

Only apply the power tool to the screw when the tool
u
is switched off. Rotating application tools can slip off.
After working at a low speed for an extended period, you
should operate the power tool at the maximum speed for ap-
proximately three minutes without load to cool it down.
English | 17
Capacity
≥2/3
≥1/3
<1/3
Reserve
1 609 92A 5AT | (19.07.2019)