Maintenance And Servicing; Maintenance And Cleaning - Bosch Professional GBS 75 AE Notice Originale

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Selecting a sanding belt
Different sanding belts are available, depending on the ma-
terial you are working with and the required surface removal
rate:
For processing all wood and wood-based ma-
terials
For pre-sanding, e.g. of rough and un-
even beams and boards
For surface sanding and levelling of
slight irregularities
For finish-sanding and fine sanding of
hardwoods
Operation
Start-up
Pay attention to the mains voltage. The voltage of the
u
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: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Switching On and Off
Make sure that you are able to press the On/Off switch
u
without releasing the handle.
To switch on the power tool, press and hold the on/off
switch (5).
To lock the on/off switch (5) press and hold it while also
pushing the lock-on button (6).
To switch off the power tool, release the on/off switch (5).
If the on/off switch (5) is locked, press the switch first and
then release it.
Preselecting the Belt Speed
You can even preselect the necessary belt speed during op-
eration using the belt speed preselection thumbwheel (4).
The required belt speed is dependent on the material and
the work conditions and can be determined using practical
tests.
Practical advice
Pull the plug out of the socket before carrying out any
u
work on the power tool.
The material removal rate when sanding and the surface
quality are primarily determined by the choice of sanding
belt and the preselected belt speed. The higher the belt
speed, the higher the removal rate and the finer the sanded
surface becomes.
Only sanding belts in perfect condition achieve good sanding
performance and make the power tool last longer.
Bosch Power Tools
Apply as little contact pressure as possible while working in
order to increase the service life of the sanding belts. The
weight of the power tool alone is enough to ensure good
sanding performance. Excessively increasing the contact
pressure will not lead to increased sanding performance,
Grit
rather it will cause more severe wear of the power tool and of
40–320
the sanding belt.
Place the running power tool on the surface you wish to work
on. Work with moderate feed and carry out sanding in paral-
lel and overlapping with the sanding path. Sand with the
Coarse 40, 60
grain; sanding marks that run against the grain result in both-
ersome sanding effects.
Especially when sanding off paint residue, the residue could
Medium 80, 100,
merge together, resulting in smears on the workpiece sur-
120, 150
face and the sanding belt. Therefore, do not work without
Fine
180, 220,
dust extraction.
280, 320
A sanding belt that has been used to work on metal should
no longer be used to work on other materials.
Use only original Bosch sanding accessories.
Only ever store sanding belts hanging up and do not fold
them as this makes them unusable.
The sanding frame (accessory) enables an even, adjustable
material removal rate while sanding large wooden surfaces.

Maintenance and Servicing

Maintenance and Cleaning

Pull the plug out of the socket before carrying out any
u
work on the power tool.
To ensure safe and efficient operation, always keep
u
the power tool and the ventilation slots clean.
Remove any adherent sanding dust using a brush.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by a
customer service centre that is authorised to repair Bosch
power tools.
Cleaning the Dust Channel (see figure B)
Remove the protective cover (11) from time to time and
clean the dust channel (12) to maintain optimal suction
power.
Changing the graphite plate (accessory) (see figure C)
The graphite plate (13) (accessory) is screwed onto the slid-
ing panel (14) and facilitates an optimum sanding finish.
The graphite plate (13) is subject to wear, relative to the in-
tensity of usage. To replace the graphite plate (13), remove
the sanding belt (2). Unscrew the graphite plate (13) and re-
place with a new one.
Once the sanding belt is replaced, adjust the belt running
(see "Changing the sanding belt (see figure A)", page 12).
After-sales service and advice on using products
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
English | 13
1 609 92A 4J7 | (24.07.2018)

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