Starting Operation - Bosch GBM 10 Operating Instructions Manual

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 (GBM 10 RE/
GBM 10 SRE/GBM 10-2 RE/GBM 13-2 RE)
The rotational direction switch 7 is used to reverse the
rotational direction of the machine. However, this is not
possible with the On/Off switch 6 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).
Gear Selection, Mechanical
(GBM 10-2 RE/ GBM 13-2/GBM 13-2 RE)
The gear selector 8 can be actuated at stand-
still or when the machine is running. However,
this should not be done while operating at full
load or maximum speed.
Two speed ranges can be preselected with the gear
selector 8.
Gear I:
Low speed range; for working with large drilling diame-
ter or for driving in screws.
Gear II:
High speed range; for working with small drilling diam-
eter.
If the gear selector 8 cannot be fully engaged, lightly
rotate the drive spindle with the drill bit by twisting the
drill chuck.
Preselecting the Speed (GBM 10-2 RE/
GBM 13-2 RE)
The required speed can be preselected with the
thumbwheel 5 (also while running).
The required speed depends on the material to be
worked and the diameter of the tool. Determine the
optimum setting through practical testing.
Switching On and Off
To start the machine, press the On/Off switch 6 and
keep it depressed.
To lock the pressed On/Off switch 6, press the lock-
on button 4.
To switch off the machine, release the On/Off switch
6 or when it is locked with the lock-on button 4, briefly
press the On/Off switch 6 and then release it.
1 609 929 K97 • 25.1.07
Adjusting the Speed (GBM 10 RE/
GBM 10 SRE/GBM 10-2 RE/GBM 13-2 RE)
The speed of the switched on power tool can be varia-
bly adjusted, depending on how far the On/Off switch
6 is pressed.
Light pressure on the On/Off switch 6 results in a low
rotational speed. Further pressure on the switch results
in an increase in speed.
Setting the Operating Mode (GBM 10 SRE)
With the "drilling/screwdriving" selector switch 20, it is
possible to select between a permanent and a pres-
sure-dependent connection between the drive and the
drill spindle.
Drilling
Set the selector switch 20 to the "drilling"
symbol.
The drill spindle is permanently connected to the drive.
This setting is suitable for drilling as well as for individ-
ual screwdriving without screwing-depth stop 21.
Screwdriving
Set the selector switch 20 to the "screwdriv-
ing" symbol.
The drill spindle is not engaged until feed pressure is
applied. This setting is suitable for serial screwdriving
with constant screw-in depth in connection with the
depth stop 12 as well as for individual screwdriving
without depth stop 12.
The screwing procedure begins when the applied pres-
sure is high enough.
The selector switch 20 can be felt to engage and can
also be actuated when the machine is running.
If the selector switch 20 cannot be pushed through to
the stop, lightly rotate the drill spindle with the tool bit.
Screwdriving with Screwing-depth Stop
(GBM 10 SRE) (see figure G)
Remove the drill chuck together with the quick-change
adapter 19. Insert a screwdriver bit 15. Slide on the
screwing-depth stop 21 to the stop.
Turning the adjustment sleeve 22 in clockwise direction
results in a greater screw-in depth; turning in anticlock-
wise direction reduces the screw-in depth.
The required setting is best determined by testing.
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