Operation Manual

English - 8
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Test run!
Check the grinding tool before use. The
grinding tool must be properly mounted
and rotate freely. Perform a test run of at
least 30 seconds without load. Do not use
damaged, out-of-round or vibrating grind-
ing tools.
Run-on Brake
This machine is equipped with the
Bosch Brake System, a patented
electro-mechanical run-on brake.
When switching off or in case of a power supply
interruption, the grinding tool is stopped within a
few seconds. This means the run-on time is re-
duced by approx. 70 % in comparison to angle
grinders without run-on brake, and that the ma-
chine can be placed down in shorter time.
Should the braking effect of the run-on brake no-
ticeably diminish, have the machine checked by
an after-sales service centre for Bosch power
tools.
Reduced Starting Current
(GWS 24-180 JBX/GWS 24-230 JBX)
As a result of soft starting, a 13 A fuse is ade-
quate.
A machine without reduced starting current
requires higher fuse protection (use at least
a 13 A time-delay fuse).
■ Exercise caution when cutting slots in
structural walls: See Information on Struc-
tures.
■ Clamp the workpiece if it does not remain sta-
tionary due to its own weight.
■ Do not strain the machine so heavily that it
comes to a standstill.
■ Grinding and cutting discs become very hot
while working; do not touch until they have
cooled.
Rough Grinding
The best roughing results are
achieved when setting the machine
at an angle of 30° to 40°. Move the
machine back and forth with mod-
erate pressure. In this manner, the
workpiece will not become too hot,
does not discolour and no grooves
are formed.
Never use a cutting disc for roughing.
Flap Disc
With the flap disc (accessory), curved surfaces
and profiles (contour sanding) can be worked.
Flap discs have a considerably higher service life
than sanding sheets, lower noise level and lower
sanding temperatures.
Cutting
When cutting, do not press, tilt or
oscillate the machine. Work with
moderate feed, adapted to the ma-
terial being cut.
Do not reduce the speed of running down cutting
discs by applying sideward pressure.
The direction in
which the cutting is
performed is impor-
tant.
The machine must
always work in an
up-grinding motion.
Therefore, never
move the machine in
the other direction!
Otherwise, the dan-
ger exists of it being
pushed uncon-
trolled out of the cut.
Operating Instructions
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23 • 1 609 929 H82 • TMS • 28.04.05