Bosch GEX 150 AC - Инструкция по эксплуатации - Страница 21

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21

Bosch Power Tools

1 609 929 N98 | (13.11.08)

Preselecting the Orbital Stroke Rate 
(GEX 125 AC / GEX 150 AC)

With the thumbwheel for preselection of the or-
bital stroke rate 

3

, you can preselect the re-

quired orbital stroke rate, even during opera-
tion.

The required stroke rate depends on the materi-
al and the working conditions and can be deter-
mined through practical testing.
The constant electronic control keeps the 
stroke rate almost constant under no-load or 
load conditions and ensures a uniform working 
performance.
After longer periods of working at low stroke 
rate, allow the machine to cool down by running 
it for approx. 3 minutes at maximum stroke rate 
with no load.

Sanding Plate Brake

An integrated sanding plate brake reduces the 
stroke rate when running at no-load so that 
scoring is prevented when placing the machine 
onto the workpiece.
If the no-load stroke rate continuously increases 
over the course of time, then the sanding plate 
is damaged and must be replaced or the sanding 
plate brake is worn. A worn sanding plate brake 
must be replaced by an authorised after-sales 
service agent for Bosch power tools.

Working Advice

f

Wait until the machine has come to a stand-
still before placing it down. 

Sanding Surfaces

Switch the machine on, place it with the com-
plete sanding surface on the surface to be 
worked and move the machine with moderate 
pressure over the workpiece.
The removal capacity and the sanding pattern 
are mainly determined by the selection of the 
sanding sheet, the preselected orbital stroke 
rate (GEX 125 AC / GEX 150 AC) and the applied 
pressure.

Only flawless sanding sheets achieve good 
sanding capacity and extend the service life of 
the machine.
Pay attention to apply uniform sanding pres-
sure; this increases the working life of the sand-
ing sheets.
Intensifiying the sanding pressure does not lead 
to an increase of the sanding capacity, but to in-
creased wear of the machine and the sanding 
sheet.
A sanding sheet that has been used for metal 
should not be used for other materials.
Use only original Bosch sanding accessories.

Rough Sanding

Attach a sanding sheet with coarse grain.
Apply only light pressure to the machine so that 
it runs at a higher stroke rate and high material 
removal is achieved.

Fine Sanding

Attach a sanding sheet with fine grain.
By lightly varying the application pressure or 
changing the orbital stroke rate (GEX 125 AC /

GEX 150 AC), the sanding plate stroke rate can 

be reduced whereby the orbital action is main-
tained.
With moderate pressure, move the machine in a 
circular pattern or alternately in lengthwise and 
crosswise directions over the workpiece. Do not 
tilt the machine to avoid sanding through the 
workpiece (e. g. when sanding veneer).
After finishing the working procedure, switch 
the power tool off.

Polishing (GEX 125 AC / GEX 150 AC)

For the polishing of weathered paint or buffing 
out scratches (e. g., acrylic glass), the machine 
can be equipped with appropriate polishing ac-
cessories such as lamb’s wool bonnet, polishing 
felt or sponge (accessories).
Select a low stroke rate (setting 1 – 2) for polish-
ing in order to avoid excessive heating of the 
surface.
Apply polishing agent crosswise or in a circular 
motion with a polishing sponge and moderate 
pressure, and then allow it to dry lightly.

1 – 2

Low  stroke  rate

3 – 4

Medium stroke rate

5 – 6

High stroke rate 

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