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| English
1 609 929 V48 | (24.5.11)
Bosch Power Tools
Assembly
f
Before any work on the machine itself, pull the mains
plug.
Auxiliary Handle
f
Operate your machine only with the auxiliary handle 6.
The auxiliary handle
6
can be set to any position for a secure
and low-fatigue working posture.
Turn the bottom part of the auxiliary handle
6
in counterclock-
wise direction and swivel the auxiliary handle
6
to the desired
position. Then retighten the bottom part of the auxiliary han-
dle
6
by turning in clockwise direction.
Changing the Tool
With the SDS-max tool holder, simpler and easier tool chang-
ing is possible without additional aids.
The dust protection cap
1
largely prevents the entry of drilling
dust into the tool holder during operation. When inserting the
tool, take care that the dust protection cap
1
is not damaged.
f
A damaged dust protection cap should be changed im-
mediately. We recommend having this carried out by
an after-sales service.
Inserting (see figure A)
Clean and lightly grease the shank end of the tool.
Push back the locking sleeve
2
and insert the tool in a twisting
manner into the tool holder. Release the locking sleeve
2
again in order to lock the tool.
Check the latching by pulling the tool.
Removing (see figure B)
Push back the locking sleeve
2
and remove the tool.
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. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
– Provide for good ventilation of the working 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 pow-
er 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.
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
, push the lock-on button
4
upward.
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.
For low temperatures, the machine reaches the full impact
rate only after a certain time.
This start-up time can be shortened by striking the chisel in
the machine against the floor one time.
Changing the Chiselling Position (Vario-Lock)
The chisel can be locked in 12 positions. In this manner, the
optimum working position can be set for each application.
Insert the chisel into the tool holder.
Push the chisel adjustment ring
3
forward and turn the chisel
to the required position with the chisel adjustment ring
3
.
Release the chisel adjustment ring
3
and turn the chisel until
it latches.
Working Advice
Sharpening Chisels (see figure C)
Good results are only achieved with sharp chisels; therefore,
sharpen the chiselling tools in good time. This ensures a long
service life of the tools and good working performance.
Re-sharpening
Sharpen chiselling tools using grinding wheels (e. g. ceramic
bonded corundum wheel) with a steady supply of water. Ref-
erence values are shown in the figure. Take care that no an-
nealing coloration appears on the cutting edges; this impairs
the hardness of the chiselling tools.
For
forging
, heat the chisel to between 850 and 1050 °C
(bright red to yellow).
For
hardening
, heat the chisel to approx. 900 °C and quench
in oil. Then anneal in an oven for approx. one hour at 320 °C
(annealing colour = light blue).
Maintenance and Service
Maintenance and Cleaning
f
Before any work on the machine itself, pull the mains
plug.
f
For safe and proper working, always keep the machine
and ventilation slots clean.
f
A damaged dust protection cap should be changed im-
mediately. We recommend having this carried out by
an after-sales service.
Lubrication
The power tool is oil-lubricated. An oil change is required only
within the scope of maintenance or repair through an author-
ised after-sales service agent for Bosch power tools. In this, it
is absolutely required to use the specified Bosch oil.
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