Bosch GSR 12 VE-2 Operating Instructions Manual page 10

OBJ_BUCH-211-001.book Page 10 Tuesday, September 19, 2006 4:43 PM
Removing the Drill Chuck (see figures E–F)
The keyless chuck 1 is secured with a securing screw
14 against unintentional loosening from the drill spin-
dle. Completely open the keyless chuck 1 and unscrew
the securing screw 14 in clockwise direction. Please
note that the securing screw has a left-hand
thread.
Clamp the short end of a hex key 15 into the keyless
chuck 1.
Place the machine on a stable surface (e.g. a work-
bench). Hold the machine firmly and loosen the keyless
chuck 1 by turning the hex key 15 in counterclockwise
direction. Loosen a tight-seated keyless chuck by giv-
ing the long end of the hex key 15 a light blow. Remove
the hex key from the keyless chuck and completely
unscrew the keyless chuck.
Mounting the Drill Chuck (see figure G)
The keyless chuck is mounted in reverse order.
Note: After mounting the keyless chuck, screw the
securing screw 14 back in again.
The drill chuck must be tightened with a
tightening torque of approx. 10–25 Nm.
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 10 to the center
position in order to avoid unintentional starting. Insert
the charged battery 8 into the handle so that it can be
felt to engage and faces flush against the handle.
Reversing the Rotational Direction (see figure C)
The rotational direction switch 10 is used to reverse the
rotational 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.
Left Rotation: For loosening or unscrewing screws,
push the rotational direction switch 10 right to the stop.
Setting the Torque
With the torque presetting ring 2 the required torque
setting can be preselected in 25 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.
10 | English
Select a higher setting or switch to the "
when unscrewing screws.
Setting range 1–20:
Lower torque for screwing in screws with small diame-
ter or into soft materials. Fine torque gradients between
the individual setting positions.
Setting range 21–25:
Higher torque for screwing in screws with large diame-
ters or into hard materials. Coarse torque gradients
between the individual setting positions.
Setting the Operating Mode (GSB 12 VE-2 /
GSB 14,4 VE-2 / GSB 18 VE-2) (see figure D)
With the operating mode preselection ring 5, you can
select between drilling/screwdriving and impact drill-
ing.
Drilling and screwdriving
Set the preselection ring 5 to the "Drilling with-
out impact" symbol.
Impact drilling
Set the preselection ring 5 to the "Impact drill-
ing" symbol.
In the "Impact drilling" position, the safety clutch is deac-
tivated and the maximum power is always effective.
Gear Selection, Mechanical
Actuate the gear selection lever 3 only when
the machine is at a complete standstill.
Two speed ranges can be preselected with the gear
selection lever 3.
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 3 cannot be pushed through to the
stop, lightly turn the drill chuck.
Switching On and Off
To start the power tool, press the On/Off switch 11
and keep it pressed.
To switch off the power tool, release the On/Off
switch 11.
Adjusting the Speed
The speed of the switched on power tool can be vari-
ably adjusted, depending on how far the On/Off switch
11 is pressed.
Light pressure on the On/Off switch 11 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 11 is not pressed, the drill
spindle and thus the tool holder are locked.
" symbol
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