20
| English
1 609 929 R66 | (10.7.08)
Bosch Power Tools
Mounting the Drill Chuck (see figure F)
The keyless chuck is mounted in reverse order.
f
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. 30–35 Nm.
Dust/Chip Extraction
f
Dusts from materials such as lead-containing
coatings, some wood types, minerals and
metal can be harmful to one’s health. Touch-
ing or breathing-in the dusts can cause aller-
gic reactions and/or lead to respiratory infec-
tions of the user or bystanders.
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
f
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)
f
Actuate the rotational direction switch 3
only when the machine is at a standstill.
The rotational direction switch
3
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:
For drilling and driving in
screws, push the rotational direction switch
3
upward on the left side and at the same time
downward on the right side.
Left Rotation:
For loosening and unscrewing
screws and nuts, push the rotational direction
switch
3
downward on the left side and at the
same time upward on the right side.
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 “Im-
pact drilling” symbol.
The selector switch
2
engages noticeably and
can also be actuated with the machine running.
Switching On and Off
To
start
the machine, press the On/Off switch
5
and keep it pressed.
To lock the
pressed
On/Off switch
5
, press the
lock-on button
4
.
To
switch off
the machine, release the On/Off
switch
5
or when it is locked with the lock-on
button
4
, briefly press the On/Off switch
5
and
then release it.
Adjusting the Speed/Impact Frequency
The speed/impact rate of the switched on pow-
er tool can be variably adjusted, depending on
how far the On/Off switch
5
is pressed.
Light pressure on the On/Off switch
5
results in
low speed/impact rate. Further pressure on the
switch increases the speed/impact rate.
Preselecting the Speed/Impact Frequency
With the thumbwheel for speed preselection
6
,
the required speed/impact frequency can be
preselected even during operation.
The required speed/impact frequency depends
on the material and the working conditions, and
can be determined through practical testing.
OBJ_BUCH-806-001.book Page 20 Thursday, July 10, 2008 12:35 PM
