Auxiliary Handle; Starting Operation; Working Advice - Berner BROS-125/150 AVE Notice Originale

Connect the dust extraction hose (13) to an ex-
tractor (accessory). You will find an overview of
connecting to various dust extractors at the end of
these operating instructions.
The dust extractor must be suitable for the mater-
ial being worked.
When extracting dry dust that is especially detri-
mental to health or carcinogenic, use a special
dust extractor.
When working on vertical surfaces, hold the
power tool with the dust extraction hose facing
downwards.

Auxiliary Handle

English
The auxiliary handle (1) enables comfortable
handling and optimum power distribution, with a
high sanding removal rate in particular.
Use the screw (2) to secure the auxiliary handle
(1) on the housing.
Operation
English

Starting Operation

English
Pay attention to the mains voltage. The
u
voltage of the power source must match the
voltage specified on the rating plate of the
power tool. Power tools marked with 230 V
can also be operated with 220 V.
Products that are only sold in AUS and NZ:
u
Use a residual current device (RCD) with a
nominal residual current of 30 mA or less.
Switching on/off
English
Make sure that you are able to press the On/
u
Off switch without releasing the handle.
To switch on the power tool, press the on/off
switch (4).
To lock the on/off switch (4), press and hold it
while also pushing the lock-on button (5).
To switch off the power tool, release the on/off
switch (4). If the on/off switch (4) is locked, press
the switch first and then release it.
Schwingzahl vorwählen
English
You can even preselect the orbital stroke rate dur-
ing operation using the necessary orbital stroke
rate preselection thumbwheel (3).
1–2 Low orbital stroke rate
3–4 Medium orbital stroke rate
5–6 High orbital stroke rate
The required orbital stroke rate is dependent on
the material and the work conditions and can be
determined using practical tests.
After working at a low orbital stoke rate for an ex-
tended period, you should operate the power tool
16 | English
at the maximum orbital stroke rate for approxim-
ately three minutes without load to cool it down.
Sanding Plate Brake
English
An integrated sanding pad brake reduces the or-
bital stroke rate when running without load to pre-
vent scoring when the power tool is placed on the
workpiece.
If the no-load orbital stroke rate constantly in-
creases over time, this means that the sanding
pad is damaged and must be replaced, or that the
sanding pad brake is worn. A worn sanding pad
brake must be replaced by an after-sales service
centre authorised to work with Berner power
tools.

Working Advice

English
Pull the plug out of the socket before carry-
u
ing out any work on the power tool.
Always wait until the power tool has come to
u
a complete stop before placing it down.
This power tool is not suitable for bench-
u
mounted use. It must not be clamped into a
vice or fastened to a workbench, for example.
Sanding Surfaces
English
Switch the power tool on, place the entire sanding
surface against the surface of the workpiece and
apply moderate pressure as you move the sander
over the workpiece.
The material removal rate and sanding result are
primarily determined by the choice of sanding
sheet, the preselected orbital stroke rate level and
the contact pressure.
Only immaculate sanding sheets achieve good
sanding performance and make the power tool
last longer.
Be sure to apply consistent contact pressure in
order to increase the lifetime of the sanding
sheets.
Excessively increasing the contact pressure will
not lead to increased sanding performance, rather
it will cause more severe wear of the power tool
and of the sanding sheet.
Do not use a sanding sheet for other materials
after it has been used to work on metal.
Use only original Berner-sanding accessories.
Rough Sanding
English
Attach a coarse grit sanding sheet.
Apply only light pressure to the power tool so that
it runs at a higher orbital stroke rate and a higher
material removal rate is achieved.
Fine Sanding
English
Attach a fine grit sanding sheet.
You can reduce the sanding plate orbital stroke
rate by lightly varying the contact pressure or
1 609 92A 4DE • 14.1.19