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OBJ_BUCH-175-003.book Page 15 Wednesday, September 22, 2010 3:44 PM
Reversing the Rotational Direction
(see figure C)
The rotational direction switch 8 is used to reverse the
rotational direction of the machine. However, this is
not possible with the On/Off switch 9 actuated.
Right Rotation: For drilling and driving in screws,
push the rotational direction switch 8 left to the stop.
Left Rotation: For loosening and unscrewing screws
and nuts, press the rotational direction switch 8
through to the right stop.
Setting the Torque
With the torque presetting ring 4 the required torque
setting can be preselected in 20 steps. With the cor-
rect setting, the insert tool is stopped as soon as the
screw is screwed flush into the material or when the
adjusted torque is reached. The safety clutch is deac-
tivated in the "
" position, e. g. for drilling.
Select a higher setting or switch to the "
when unscrewing screws.
Gear Selection, Mechanical
¢ Actuate the gear selector 5 only when the
machine is at a standstill.
Two speed ranges can be preselected with the gear
selector 5.
Gear I:
Low speed range; for screwdriving or working with
large drilling diameter.
Gear II:
High speed range; for working with small drilling diam-
eter.
If the gear selector 5 cannot be pushed through to the
stop, lightly turn the tool holder 2 with the insert tool.
Switching On and Off
To start the machine, press the On/Off switch 9 and
keep it pressed.
The power light 10 lights up when the On/Off switch
9 is slightly or completely pressed, and allows the
work area to be illuminated when lighting conditions
are insufficient.
To switch off the machine, release the On/Off switch
9.
Adjusting the Speed
The speed of the switched on power tool can be vari-
ably adjusted, depending on how far the On/Off
switch 9 is pressed.
Light pressure on the On/Off switch 9 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 9 is not pressed, the drill
spindle and thus the tool holder are locked.
1 609 929 U97 • 22.9.10
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 9 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 release the
On/Off switch 9. By doing so, the head of the screw
does not penetrate into the material.
Temperature Dependent Overload Protection
When using as intended for, the power tool cannot be
subject to overload. When the load is too high or the
allowable battery temperature range of 0–70 °C is
exceeded, the speed is reduced. The power tool will
not run at full speed until reaching the allowable bat-
" symbol
tery temperature.
Working Advice
¢ Apply the power tool to the screw only when
it is switched off. Rotating tool inserts can slip
off.
Tips
After longer periods of working at low speed, allow
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 sharpened HSS
drill bits (HSS=high-speed steel). The appropriate
quality is guaranteed by the Berner accessories pro-
gram.
Before screwing larger, longer screws into hard mate-
rials, it is advisable to predrill a pilot hole with the core
diameter of the thread to approx.
length.
Maintenance and Service
Maintenance and Cleaning
¢ Before any work on the machine itself (e. g.
maintenance, tool change, etc.) as well as
during transport and storage, remove the
battery from the power tool. There is danger of
injury when unintentionally actuating the On/Off
switch.
¢ For safe and proper working, always keep
the machine and ventilation slots clean.
When the battery is no longer operative, please refer
to an authorised after-sales service agent for Berner
power tools.
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of the screw
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English | 15
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