Bosch GWX 18V-8 Professional Manual Original página 27

The regulations on the material being machined that apply in
the country of use must be observed.
Avoid dust accumulation at the workplace. Dust can
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easily ignite.
Operation
Do not load the power tool so heavily that it comes to a
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stop.
Remove the battery from the power tool before carry-
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ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
Exercise caution when cutting slots in structural walls;
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see the "Information on structural design" section.
Clamp the workpiece if it is not secure under its own
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weight.
If the power tool has been subjected to a heavy load,
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continue to run it at no-load for several minutes to
cool down the accessory.
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.
If the power tool becomes electrostatically charged, the
built-in electronics will switch the power tool off. Press the
on/off switch (5) again to restart the power tool.
Practical 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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cutting (11) or the protective guard for grinding (10)
with a fitted cover for cutting (14) 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 cutting (11) or the protective
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guard for grinding (10) with a fitted cover for cutting (14)
must be used when using bonded discs which are ap-
proved 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.
Bosch Power Tools
Surface grinding with sanding disc
Always fit the hand guard (19) when working with the
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rubber sanding pad (20).
Grinding with a sanding disc can be done without a protect-
ive guard.
See the graphics page for fitting instructions.
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 (19) 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.
Cutting Metal
For cutting metal with bonded cutting discs or dia-
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mond cutting discs, always use the protective guard
for cutting (11) or the protective guard for
grinding (10) with a fitted cover for cutting (14).
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 concrete/stone, always use the
extraction guard for cutting with a cutting guide (26)
or the protective guard for cutting (11) or the protect-
ive guard for grinding (10) with a fitted cover for
cutting (14).
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.
English | 27
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.
1 609 92A 76B | (16.02.2022)