Starting Operation - Bosch GSB Professional 12-2 Originalbetriebsanleitung

OBJ_DOKU-19878-001.fm Page 20 Thursday, January 14, 2010 11:30 AM
20 | English
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 cen-
tre position in order to avoid unintentional start-
ing. Insert the charged battery 6 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 re-
verse 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 22 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
" " position, e. g. for drilling.
Select a higher setting or switch to the
" " symbol when unscrewing screws.
Setting the Operating Mode (see figure C)
With the operating mode preselection ring 3,
you can select between drilling/screwdriving
and impact drilling.
Drilling and screwdriving
Set the preselection ring 3 to the "Drill-
ing without impact" symbol.
2 609 140 727 | (14.1.10)
Impact drilling
Set the preselection ring 3 to the "Im-
pact drilling" symbol.
In the "Impact drilling" position, the safety
clutch is deactivated and the maximum power is
always effective.
Gear Selection, Mechanical
Actuate the gear selector 4 only when the
machine is at a standstill.
Two speed ranges can be preselected with the
gear selector 4.
Gear I:
Low speed range; for screwdriving or working
with large drilling diameter.
Gear II:
High speed range; for working with small drilling
diameter.
If the gear selector 4 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 pressed.
To switch off the machine, release the On/Off
switch 9.
Adjusting the Speed
The speed of the switched on power tool can be
variably 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 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 9 is released, the chuck
brakes to a stop, thus preventing the run-on of
the tool.
Bosch Power Tools