Working Advice - Bosch GWS 18V-180 PC Professional Manual Original

14 | English
Do not use the power tool with a cut-off stand.
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Do not touch grinding and cutting discs until they have
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cooled down. The discs can become very hot while work-
ing.

Working advice

Rough grinding
Always use the protective guard for grinding (10)
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when rough grinding with bonded abrasives.
Never use cutting discs for rough grinding.
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When rough grinding, the protective guard for
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grinding (10) with a fitted cover for cutting (11) can
impact the workpiece and lead to a loss of control.
The best rough grinding results are achieved with a set angle
of 30° to 40°. Move the power tool back and forth with mod-
erate pressure. This will ensure that the workpiece does not
become too hot or discolour and that grooves are not
formed.
The protective guard for grinding (10) must be used with
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a fitted cover for cutting (11) when using bonded discs
which are approved for cutting and grinding.
Surface grinding with flap disc
Always use the protective guard for grinding (10)
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when grinding with the flap disc.
The flap disc (accessory) enables you to machine curved
surfaces and profiles. Flap discs have a considerably longer
service life, lower noise levels and lower grinding temperat-
ures than conventional grinding discs.
Surface grinding with sanding disc
Always fit the hand guard (17) when working with the
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rubber sanding pad (18).
Grinding with a sanding disc can be done without a protect-
ive guard.
See the graphics page for fitting instructions.
Screw on the round nut (21) and tighten it with the two-pin
spanner.
Cup brush/disc brush/conical brush
Always use the protective guard for grinding (10)
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when brushing with disc brushes. Brushing with cup
brushes/conical brushes can be performed without
the protective guard.
Always fit the hand guard (17) when working with the
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cup brush or conical brush.
The wires of the disc brush can get caught on the pro-
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tective guard and break, if the maximum permitted di-
mensions of the disc brushes are exceeded.
See the graphics page for fitting instructions.
The cup brush/conical brush/disc brush with M14 thread
must be screwed onto the grinding spindle until it rests
firmly against the grinding spindle flange at the end of the
grinding spindle thread. Tighten the cup brush/conical
brush/disc brush with an open-ended spanner.
To fasten the disc brush with a diameter of 22.22 mm, at-
tach the mounting flange with O-ring (12) to the grinding
1 609 92A 7AU | (05.08.2022)
spindle (16), screw on the round nut (21) and tighten with
the two-pin spanner.
Cutting Metal
For cutting metal with bonded cutting discs or dia-
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mond cutting discs, always use the protective guard
for grinding (10) with a fitted cover for cutting (11).
When using the protective guard for grinding (10) for
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cutting work with bonded cutting discs, there is an in-
creased risk of being exposed to sparks, particles and
disc fragments if the disc breaks.
When carrying out abrasive cutting, use a moderate feed
that is suited to the material being machined. Do not exert
pressure on the cutting disc and do not tilt or swing the
power tool.
Do not attempt to reduce the speed of a cutting disc coming
to a stop by applying pressure from the side.
Cutting stone
For cutting stone with bonded cutting discs or dia-
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mond cutting discs for stone/concrete, always use the
protective guard for grinding (10) with a fitted cover
for cutting (11).
Provide sufficient dust extraction when cutting stone.
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Wear a dust mask.
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The power tool may be used only for dry cutting/grind-
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ing.
When using the protective guard for grinding (10) or
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the protective guard for grinding (10) with a fitted
cover for cutting (11) for cutting and grinding applica-
tions in concrete or masonry, there is an increased
dust load and an increased risk of losing control of the
power tool, which can lead to kickback.
For cutting stone, it is best to use a diamond cutting disc.
When cutting especially hard materials such as concrete
with a high pebble content, the diamond cutting disc can
overheat and become damaged as a result. This is clearly in-
dicated by circular sparking, rotating with the diamond cut-
ting disc.
If this happens, stop cutting and allow the diamond cutting
disc to cool down by running the power tool for a short time
at maximum speed with no load.
If work is noticeably slower and with circular sparking, this
indicates that the diamond cutting disc has become blunt.
You can resharpen the disc by briefly cutting into abrasive
material (e.g. lime-sand brick).
The power tool must always
work in an up-grinding mo-
tion. Otherwise there is a
risk that it will be pushed
uncontrolled out of the cut.
For best results when cut-
ting profiles and rectangular
tubing, start at the smallest
cross section.
Bosch Power Tools