Operation; Start-Up; Inserting The Battery; Practical Advice - Bosch Professional GSR 12V-35 FC Original Instructions Manual

18 | English
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the ma-
terials to be worked.
Avoid dust accumulation at the workplace. Dust can
u
easily ignite.

Operation

Start-up

Inserting the battery

Note: The use of batteries unsuitable for your power tool can
lead to malfunctions or damage to the power tool.
Set the rotational direction switch (6) to the middle position
to avoid unintentionally switching it on. Insert the charged
battery (5) into the handle until you feel it engage and it is
flush with the handle.
Setting the rotational direction (see figure H)
The rotational direction switch (6) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (7) is being pressed.
Right rotation: To drill and to drive in screws, press the ro-
tational direction switch (6) through to the left stop.
Left Rotation: To loosen and unscrew screws and nuts,
press the rotational direction switch (6) through to the right
stop.
Preselecting the Torque
The torque presetting ring (2) 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 (3) when the power
u
tool is not in use.
You can preselect two speed ranges with the gear selector
(3).
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.
Switching on/off
To start the power tool, press and hold the on/off switch
(7).
The lamp lights up when the on/off switch (7) is lightly or
fully pressed for a few seconds, meaning that the work area
is illuminated in poor lighting conditions.
To switch off the power tool, release the on/off switch (7).
1 609 92A 4TV | (03.05.2019)
Adjusting the Speed
You can adjust the speed of the power tool when it is on by
pressing in the on/off switch (7) to varying extents.
A light pressure on the on/off switch (7) results in a low rota-
tional speed. Increased pressure on the switch causes an in-
crease in speed.
Fully automatic spindle lock (Auto-Lock)
The drill spindle, and therefore the tool holder, are locked
when the on/off switch (7) 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.
Battery charge-control indicator
When the on/off switch (7) is pressed in halfway or com-
pletely, the battery charge-control indicator (8) indicates
the charge condition of the battery for several seconds. The
indicator consists of three green LEDs.
The three LEDs of the battery charge-control indicator (8)
and the lamp flash urgently when the temperature of the bat-
tery falls or rises outside the operating temperature range of
–20 to +50 °C.
LED
Continuous light 3 x green
Continuous light 2 x green
Continuous light 1 x green
Slowly flashing light 1 x green
Temperature-dependent overload protection
In normal conditions of use, the power tool cannot be over-
loaded. If there is an extreme overload, the power tool
switches off until the optimal operating temperature range is
reached again.
This status is indicated by the three battery charge indicator
(8) LEDs flashing in a chase sequence. The LEDs turn off if
the power tool has reached the optimum operating temper-
ature again.

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.
When drilling into metal, only use sharpened HSS drills (HSS
= high-speed steel) which are in perfect condition. The
Bosch accessory range guarantees appropriate quality.
Before screwing larger, longer screws into hard materials, it
is advisable to pre-drill a pilot hole with the core diameter of
the thread to approx. 2/3 of the screw length.
Belt clip (see figure I)
You can use the belt clip (17) to hang the power tool on a
belt, for example. You then have both hands free and the
power tool is always within easy reach.
Capacity
≥ 76%
51–75 %
26–50 %
≤ 25%
Bosch Power Tools