Bosch 0.601.993.H20 Manual Original página 24

Certain dusts, such as oak or beech dust, are
considered as carcinogenic, especially in
connection with wood-treatment additives
(chromate, wood preservative). Materials
containing asbestos may only be worked by
specialists.
– Provide for good ventilation of the work-
ing place.
– It is recommended to wear a P2 filter-
class respirator.
Observe the relevant regulations in your
country for the materials to be worked.
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 9 to the cen-
tre position in order to avoid unintentional start-
ing. 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 F)
The rotational direction switch 9 is used to re-
verse the rotational 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.
Bosch Power Tools
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
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 range 1–20:
Lower torque for screwing in screws with small
diameter or into soft materials. Fine torque gra-
dients between the individual setting positions.
Setting range 21–25:
Higher torque for screwing in screws with large di-
ameters or into hard materials. Coarse torque gra-
dients between the individual setting positions.
Setting the Operating Mode (GSB 12 VE-2/
GSB 14,4 VE-2/GSB 18 VE-2) (see figure G)
With the operating mode preselection ring 4,
you can select between drilling/screwdriving
and impact drilling.
Drilling and screwdriving
Set the preselection ring 4 to the
"Drilling without impact" symbol.
Impact drilling
Set the preselection ring 4 to the
"Impact 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 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
diameter.
If the gear selector 3 cannot be pushed through
to the stop, lightly turn the drill chuck with drill.
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2 609 932 649 | (17.8.09)