Bosch Professional GSR 18V-90 C Original Instructions Manual page 20

20 | English
Open the keyless chuck (2) by turning it in the direction of
rotation ➊ until the tool can be inserted. Insert the tool.
Firmly tighten the keyless chuck (2) by turning it by hand in
the direction of rotation ➋. This will automatically lock the
drill chuck.
Dust/Chip Extraction
Dust from materials such as lead-containing coatings, some
wood types, minerals and metal can be harmful to one's
health. Touching or breathing-in the dust can cause allergic
reactions and/or lead to respiratory infections of the user or
bystanders.
Certain dust, such as oak or beech dust, is considered carci-
nogenic, especially in connection with wood-treatment ad-
ditives (chromate, wood preservative). Materials containing
asbestos may only be worked by specialists.
– Provide for good ventilation of the working place.
– 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
Starting Operation
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 (11) to the middle posi-
tion to avoid unintentionally switching it on. Insert the
charged battery (7) into the handle until you feel it engage
and it is flush with the handle.
Setting the rotational direction (see figure B)
The rotational direction switch (11) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (12) is being pressed.
Rotate clockwise: Slide the rotational direction
switch (11) on both sides until it stops in the
tion.
Rotate anti-clockwise: Slide the rotational direction
switch (11) on both sides until it stops in the
tion.
Setting the operating mode
Drilling
GSR 18V-90 C
Set the torque presetting ring (3) to the
"drilling" symbol.
GSB 18V-90 C
Set the operating mode presetting ring (4) to
the "drilling" symbol.
Screwdriving
1 609 92A 6GU | (23.06.2022)
GSR 18V-90 C
Set the torque presetting ring (3) to the re-
quired torque.
GSB 18V-90 C
Set the operating mode presetting ring (4) to
the "screwdriving" symbol.
Set the torque presetting ring (3) to the re-
quired torque.
Impact drilling
GSB 18V-90 C
Set the operating mode presetting ring (4) to
the "impact drilling" symbol.
Switching on/off
To start the power tool, press and hold the on/off switch
(12).
The LED (18) lights up when the on/off switch (12) 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 (12).
Adjusting the speed
You can adjust the speed of the power tool when it is on by
pressing in the on/off switch (12) to varying extents.
A light pressure on the on/off switch (12) results in a low ro-
tational speed. Increased pressure on the switch causes an
increase in speed.
Preselecting torque (applies to screwdriving mode)
When the precision clutch is activated, you can pre-set the
required torque over 20 increments using the torque pre-
setting ring (3). Once the set torque has been reached, the
application tool will be stopped. When the precision clutch is
deactivated, the clutch will be released and the application
tool will not be stopped.
Mechanical gear selection
Only operate the gear selector (5) when the power
u
tool is not in use.
First gear:
Low speed range; for working with a large drilling diameter
posi-
or for screwdriving.
Second gear:
High speed range; for working with a small drilling diameter.
posi-
Temperature-dependent overload protection
When used as intended, the power tool cannot be over-
loaded. If the power tool is overloaded or not kept within the
permitted operating temperature range, the speed is re-
duced or the power tool is switched off. The power tool will
not run at full speed again until the permitted operating tem-
perature has been reached.
Activation of the temperature-controlled overload protector
is indicated by the LED (15) on the power tool lighting up
red.
– To return to within the permitted operating temperature
range, run the power tool at no load or wait until the
LED (15) lights up green again.
Bosch Power Tools