Bosch 0.601.993.H20 Manual Original página 25

24 | English
Switching On and Off
To start the machine, press the On/Off switch
10 and keep it pressed.
To switch off the machine, release the On/Off
switch 10.
Adjusting the Speed
The speed of the switched on power tool can be
variably adjusted, depending on how far the
On/Off switch 10 is pressed.
Light pressure on the On/Off switch 10 results
in a low rotational speed. Further pressure on
the switch results in an increase in speed.
Fully automatic spindle locking (Auto-lock)
When the On/Off switch 10 is not pressed, the
drill spindle and thus the tool holder are locked.
This enables screws to be screwed in, even
when the battery is empty and allows for the
machine to be used as a screwdriver.
Run-on Brake
When the On/Off switch 10 is released, the
chuck brakes to a stop, thus preventing the run-
on of the tool.
When driving in screws, wait until the screw is
screwed in flush with the material and then re-
lease the On/Off switch 10. By doing so, the
head of the screw does not penetrate into the
material.
Working Advice
Apply the power tool to the screw only
when it is switched off. Rotating tool inserts
can slip off.
Note: Pay attention that no metal particles enter
the power tool.
After longer periods of working at low speed, al-
low the machine to cool down by running it for
approx. 3 minutes at maximum speed with no
load.
For drilling in metal, use only perfectly sharp-
ened HSS drill bits (HSS=high-speed steel). The
appropriate quality is guaranteed by the Bosch
accessories program.
2 609 932 649 | (17.8.09)
Before screwing larger, longer screws into hard
materials, it is advisable to predrill a pilot hole
with the core diameter of the thread to approx.
2
/ of the screw length.
3
Maintenance and Service
Maintenance and Cleaning
Before any work on the machine (e. g.,
maintenance, tool change, etc.) as well as
during transport and storage, set the rota-
tional direction switch to the centre posi-
tion. Unintentional actuation of the On/Off
switch can lead to injuries.
For safe and proper working, always keep
the machine and ventilation slots clean.
If the machine should fail despite the care taken
in manufacturing and testing procedures, repair
should be carried out by an after-sales service
centre for Bosch power tools.
In all correspondence and spare parts order,
please always include the 10-digit article
number given on the type plate of the machine.
Replacing the Carbon Brushes (see figure H)
When the carbon brushes are worn, the power
tool switches off automatically. For replacement
of the carbon brushes, unscrew the four screws
of the cover lid 16 and remove the cover lid 16.
Insert a screwdriver or similar into the notch of
the brush holder 15 and carefully pry it out. Re-
move the used carbon brushes and replace
them. The new carbon brushes can also be in-
serted when turned by 180°. Lightly press the
inserted carbon brushes downward until they
can be clearly heard to engage. Afterwards
mount the cover lid 16 again.
Bosch Power Tools