Starting Operation - Bosch gsb 18-2 Professional Originalbetriebsanleitung

20 | English
Removing the Drill Chuck (see figure E)
Disassemble the auxiliary handle and set the gear
selector 8 to the centre position between the 1st
and 2nd gear.
Insert a steel pin with a diameter of Ø 4 mm and
approx. 50 mm of length into the drill hole on the
spindle neck in order to lock the drill spindle.
Clamp the short end of an Allen key 16 into the
keyless chuck 1.
Place the machine on a stable surface (e.g. a
workbench). Hold the machine firmly and loosen
the keyless chuck 1 by turning the Allen key 16 in
rotation direction
less chuck by giving the long end of the Allen key
16 a light blow. Remove the Allen key from the
keyless chuck and completely unscrew the key-
less chuck.
For machines with keyless chuck, an open-end
spanner (size 19 mm) can be applied to the drill
chuck instead of an Allen key.
Mounting the Drill Chuck (see figure F)
The keyless chuck is mounted in reverse order.
Remove the steel pin from the drill hole on
the spindle neck after mounting is complet-
ed.
The drill chuck must be tightened with a
tightening torque of approx. 35–40 Nm.
Operation

Starting Operation

Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V can
also be operated with 220 V.
Reversing the Rotational Direction
(see figures G–H) (GSB 18-2 RE)
Actuate the rotational direction switch 7 on-
ly when the machine is at a standstill.
1 609 929 M17 | (5.9.07)
. Loosen a tight-seated key-
The rotational direction switch 7 is used to re-
verse the rotational direction of the machine.
However, this is not possible with the On/Off
switch 5 actuated.
Right rotation: Press the rotational direction
switch 7 through to the right stop (for drilling
and driving screws).
Left rotation: Press the rotational direction
switch 7 through to the left stop (for loosening
and unscrewing screws and nuts).
Setting the Operating Mode
Drilling and Screwdriving
Set the selector switch 2 to the "Drill-
ing" symbol.
Impact Drilling
Set the selector switch 2 to the "Impact
drilling" symbol.
The selector switch 2 engages noticeably and
can also be actuated with the machine running.
Gear Selection, Mechanical
The gear selector 8 can be actuated on ma-
chines running at low speed. However, this
should not be done when the machine is
stopped, at full load or running at maximum
speed.
Two speed ranges can be preselected with the
gear selector 8.
Gear I:
Low speed range; for working with
large drilling diameter or for driving
in screws.
Gear II:
High speed range; for working with
small drilling diameter.
If the gear selector 8 cannot be fully engaged,
lightly rotate the drive spindle with the drill bit by
twisting the drill chuck.
Switching On and Off
To start the machine, press the On/Off switch 5
and keep it depressed.
To lock the pressed On/Off switch 5, press the
lock-on button 4.
Bosch Power Tools