Maintenance And Service - Bosch PSR 12-2 Original Instructions Manual

OBJ_BUCH-213-003.book Page 14 Monday, October 10, 2011 7:57 AM
14 | English
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 10 to the centre position in
order to avoid unintentional starting. Insert the charged bat-
tery 8 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 10 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 11 actuated.
Right Rotation: For drilling and driving in screws, push the
rotational direction switch 10 left to the stop.
The indicator for right rotation 4 lights up when the
On/Off switch 11 is actuated and the motor is run-
ning.
Left Rotation: For loosening or unscrewing screws, push the
rotational direction switch 10 right to the stop.
The indicator for left rotation 5 lights up when the
On/Off switch 11 is actuated and the motor is run-
ning.
Setting the Torque
With the torque presetting ring 2 the required torque setting
can be preselected in 25 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 "
drilling.
Select a higher setting or switch to the "
screwing screws.
Gear Selection, Mechanical
Actuate the gear selector 3 only when the machine is at
a standstill.
Two speed ranges can be preselected with the gear selector
3.
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 3 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 11 and keep it
pressed.
The power light 9 lights up when the On/Off switch 11 is
slightly or completely pressed, and allows the work area to be
illuminated when lighting conditions are insufficient.
To switch off the machine, release the On/Off switch 11.
2 609 005 640 | (10.10.11)
Adjusting the Speed
The speed of the switched on power tool can be variably ad-
justed, depending on how far the On/Off switch 11 is
pressed.
Light pressure on the On/Off switch 11 results in a low rota-
tional speed. Further pressure on the switch results in an in-
crease in speed.
Fully automatic spindle locking (Auto-lock)
When the On/Off switch 11 is not pressed, the drill spindle
and thus the tool holder are locked.
This enables screws to be screwed in, even when the battery is
empty and allows for the machine to be used as a screwdriver.
Run-on Brake
When the On/Off switch 11 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 11.
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.
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
" position, e. g. for
thread to approx.
" symbol when un-

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-
age, set the rotational direction switch to the centre
position. Unintentional actuation of the On/Off switch can
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:
2
/ of the screw length.
3
Bosch Power Tools