Maintenance And Service - Bosch GSR 12-2 Professional Original Instructions Manual

OBJ_BUCH-585-004.book Page 15 Tuesday, April 5, 2011 7:36 AM
Observe the relevant regulations in your country for the
materials to be worked.
Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
Inserting the Battery
Use only original Bosch O-pack batteries with the volt-
age given on the type plate of your machine. The use of
other batteries can lead to injuries and danger of fire.
Set the rotational direction switch 9 to the centre position in
order to avoid unintentional starting. Insert the charged bat-
tery 6 into the handle so that it can be felt to engage and faces
flush against the handle.
Reversing the Rotational Direction (see figure E)
The rotational direction switch 9 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 10 actuated.
Right Rotation: For drilling and driving in screws, push the
rotational direction switch 9 left to the stop.
Left Rotation: For loosening or unscrewing screws, push the
rotational direction switch 9 right to the stop.
Setting the Torque
With the torque presetting ring 4 the required torque setting
can be preselected in 25+1 steps. With the correct setting,
the insert tool is stopped as soon as the screw is screwed
flush into the material or when the adjusted torque is reached.
The safety clutch is deactivated in the "
drilling.
Select a higher setting or switch to the "
screwing screws.
Gear Selection, Mechanical
Actuate the gear selector 5 only when the machine is at
a standstill.
Two speed ranges can be preselected with the gear selector
5.
Gear I:
Low speed range; for screwdriving or working with large drill-
ing diameter.
Gear II:
High speed range; for working with small drilling diameter.
If the gear selector 5 cannot be pushed through to the stop,
lightly turn the drill chuck with drill.
Switching On and Off
To start the machine, press the On/Off switch 10 and keep it
pressed.
To switch off the machine, release the On/Off switch 10.
Adjusting the Speed
The speed of the switched on power tool can be variably ad-
justed, depending on how far the On/Off switch 10 is
pressed.
Bosch Power Tools
Light pressure on the On/Off switch 10 results in a low rota-
tional speed. Further pressure on the switch results in an in-
crease in speed.
Run-on Brake
When the On/Off switch 10 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 release the On/Off switch 10.
By doing so, the head of the screw does not penetrate into the
material.
Working Advice
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, allow the ma-
chine to cool down by running it for approx. 3 minutes at max-
imum speed with no load.
For drilling in metal, use only perfectly sharpened HSS drill
bits (HSS=high-speed steel). The appropriate quality is guar-
anteed 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.

Maintenance and Service

Maintenance and Cleaning
Before any work on the machine (e. g., maintenance,
tool change, etc.) as well as during transport and stor-
" position, e. g. for
age, set the rotational direction switch to the centre
position. Unintentional actuation of the On/Off switch can
" symbol when un-
lead to injuries.
For safe and proper working, always keep the machine
and ventilation slots clean.
If the machine should fail despite the care taken in manufac-
turing and testing procedures, repair should be carried out by
an after-sales service centre for Bosch power tools.
In all correspondence and spare parts order, please always in-
clude the 10-digit article number given on the type plate of
the machine.
After-sales Service and Customer Assistance
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Our customer service representatives can answer your ques-
tions concerning possible applications and adjustment of
products and accessories.
English | 15
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/ of the screw length.
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2 609 140 810 | (5.4.11)