Working Advice; Maintenance And Service; Maintenance And Cleaning - Berner BACS-1 Manual Original

OBJ_BUCH-175-005.book Page 15 Friday, August 21, 2015 7:48 AM
or when the adjusted torque is reached. The safety
clutch is deactivated in the "
drilling.
Select a higher setting or switch to the
" " symbol when unscrewing screws.
Gear selection, mechanical
 Actuate the gear selector 5 only when the ma-
chine 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 di-
ameter.
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 al-
lows the work area to be illuminated when lighting
conditions are insufficient.
To switch off the machine, release the On/Off
switch 9.
To save energy, only switch the power tool on
when using it.
Adjusting the Speed
The speed of the switched-on power tool can be
variably 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.
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 is ex-
1 609 92A 1E1 • 21.8.15
ceeded, the speed is reduced. The power tool will
" position, e. g. for not run at full speed until reaching the allowable
battery 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 appro-
priate quality is guaranteed by the Berner accesso-
ries program.
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.
screw length.

Maintenance and Service

Maintenance and Cleaning

 Before any work on the machine itself (e. g.
maintenance, tool change, etc.) as well as dur-
ing 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 re-
fer to an authorised after-sales service agent for
Berner power tools.
Always keep the tool holder 2 and the insert tool
clean to ensure the locking and releasing function
of the locking sleeve 3.
If the machine should fail despite the care taken in
manufacturing and testing procedures, repair
should be carried out by an after-sales service cen-
tre for Berner power tools.
In all correspondence and spare parts orders,
please always include the 6-digit order number giv-
en on the nameplate of the machine.
Transport
The contained lithium-ion batteries are subject to
the Dangerous Goods Legislation requirements.
The user can transport the batteries by road with-
out further requirements.
When being transported by third parties (e.g.: air
transport or forwarding agency), special require-
2
/ of the
3
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