Operation - Bosch GSR 12 V Operating Instructions Manual

OBJ_BUCH-208-002.book Page 17 Wednesday, September 6, 2006 7:54 AM

Operation

Starting Operation
Inserting the Battery
Use only original Bosch O-pack batteries with
the voltage 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 8 to the centre posi-
tion in order to avoid unintentional starting. Insert the
charged battery 7 into the handle so that it can be felt
to engage and faces flush against the handle.
Reversing the Rotational Direction (see figure B)
The rotational direction switch 8 is used to reverse the
rotational direction of the machine. However, this is not
possible with the On/Off switch 9 actuated.
Right Rotation: For drilling and driving in screws,
push the rotational direction switch 8 left to the stop.
Left Rotation: For loosening or unscrewing screws,
push the rotational direction switch 8 right to the stop.
Setting the Torque
With the torque presetting ring 2 the required torque
setting can be preselected in 20 steps. With the cor-
rect 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 deacti-
vated in the " " position, e. g. for drilling.
Select a higher setting or switch to the "
when unscrewing 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 drilling diameter.
Gear II:
High speed range; for working with small drilling diam-
eter.
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 9 and
keep it depressed.
To switch off the machine, release the On/Off switch
9.
2 609 140 67 0 • 6.9.06
Adjusting the Speed
The speed of the switched on power tool can be varia-
bly adjusted, depending on how far the On/Off switch
9 is pressed.
Light pressure on the On/Off switch 9 results in a low
rotational speed. Further pressure on the switch results
in an increase in speed.
Fully automatic spindle locking (Auto-lock)
When the On/Off switch 9 is not pressed, the drill spin-
dle 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 9 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 9. By doing so, the head of the screw does not
penetrate into the material.
Operating Instructions
Apply the power tool to the screw only when
it is switched off. Rotating tool inserts can slip off.
Soft Grip
The gripping surface (soft grip) 4 reduces the danger
of slipping and thereby improves the grip on the
machine and the handling.
" symbol
At the same time, the rubber coating achieves a vibra-
tion-reducing effect.
Tips
After longer periods of working at low speed, allow the
machine to cool down by running it for approx.
3 minutes at maximum speed with no load.
For drilling in metal, use only perfectly sharpened HSS
drill bits (HSS=high-speed steel). The appropriate
quality is guaranteed by the Bosch accessories pro-
gram.
Before screwing larger, longer screws into hard mate-
rials, it is advisable to predrill a pilot hole with the core
diameter of the thread to approx.
length.
2
/ of the screw
3
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