Starting Operation; Working Advice; Maintenance And Service; Maintenance And Cleaning - Bosch GBS 75 AE Professional Manual Original

Operation

Starting Operation

Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V
can also be operated with 220 V.
Switching On and Off
To start the machine, press the On/Off switch 5
and keep it pressed.
To lock the pressed On/Off switch 5, press the
lock-on button 6.
To switch off the machine, release the On/Off
switch 5 or when it is locked with the lock-on
button 6, briefly press the On/Off switch 5 and
then release it.
Preselecting the Belt Speed
The necessary belt speed can be preselected
with the thumbwheel 4, even during operation.
The required belt speed depends on the materi-
al being sanded and on the working conditions,
and can be determined by practical testing.

Working Advice

The sanding removal rate and the surface quality
are mainly determined by the selection of the
sanding belt as well as by the preselected belt
speed. The higher the belt speed, the more ma-
terial is removed and the finer the sanded sur-
face.
Only flawless sanding belts achieve good sand-
ing capacity and make the machine last longer.
Work using the least possible sanding pressure
in order to increase the service life of the sand-
ing belts. The machine's own weight is sufficient
for a good sanding performance. An excessive
increase of the sanding pressure does not lead
to an increase of the sanding capacity, but to in-
creased wear of the machine and the sanding
belt.
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Apply the machine to the workpiece only when
switched on. Work with moderate feed and car-
ry out the sanding with parallel and overlapping
strokes. Sand in the direction of the grain; sand-
ing across the grain produces an uneven sand-
ing effect.
Particularly when sanding coats of varnish, sand
in the direction of the grain as the varnish could
melt and smear the surface of the workpiece
and the sanding belt. Therefore, work with dust
extraction.
A sanding belt used for sanding metal should
not be used for other materials.
Use only original Bosch sanding accessories.
Store sanding belts only hanging; avoid creas-
ing, as this makes the belts unusable.
The sanding frame (accessory) allows for uni-
form and controllable removal capacity when
surface grinding larger wooden surfaces.

Maintenance and Service

Maintenance and Cleaning

Remove adherent sanding dust with a brush.
Cleaning the Dust Passage (see figure B)
From time to time, remove the protection cover
11 and clean the dust passage 12 so that the
suction capacity remains at an optimum level.
Changing the Graphit Plate (Accessory)
(see figure C)
The graphite plate 13 (accessory) is screwed on-
to the guide plate 14 and enables an optimum
sanding pattern.
Before any work on the machine itself, pull
the mains plug.
For safe and proper working, always keep
the machine and ventilation slots clean.
2 609 932 722 | (17.12.09)
English | 19