Starting Operation; Working Advice - Bosch GBS 75 AE Professional Originalbetriebsanleitung

18 | English
Integrated Dust Extraction with Dust Bag
For small sanding jobs, a dust bag 7 (accessory)
can be connected. Attach the sleeve of the dust
bag firmly onto the outlet piece 9. To maintain
optimum dust collection, empty the dust bag 7
in good time.
Changing the Sanding Belt
(see figure A)
– Completely pivot out the clamping lever 3.
The sanding belt 2 is now loose and can be
removed.
– Mount the new sanding belt 2. Pay attention
that the direction of the arrows on the inside
of the sanding belt correspond with the ar-
row direction on the machine housing.
– Pivot the clamping lever 3 back to its initial
position.
– Pick up the power tool and switch it on. Ad-
just the belt run with adjustment knob 8 until
the edge of the sanding belt runs flush with
the guide plate 13.
Pay attention that the sanding belt 2 does not
move excessively and make contact with the
housing. Check the belt run regularly and read-
just with the adjusment knob 8.
Selecting the Sanding Belt
Depending on the material to be worked and the
required rate of removal, different sanding belts
are available:
For the working of all
wooden materials
For coarse-sanding,
e. g. of rough,
unplaned beams and
boards
For face sanding and
planing small irregu-
larities
For finish and fine
sanding of hard
woods
2 609 932 674 | (27.2.09)
Grain size
40—240
coarse 40, 60
medium 80, 100, 120
fine 180, 240
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.
Bosch Power Tools