Bosch Professional GWS 21-230 H Original Instructions Manual page 10

10 | English
Fitting
Fitting protective equipment
Pull the plug out of the socket before carrying out any
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work on the power tool.
Note: If the grinding disc breaks during operation or the
holding fixtures on the protective guard/power tool become
damaged, the power tool must be sent to the after-sales ser-
vice immediately; see the "After-sales service and advice on
using products" section for addresses.
Protective guard for grinding
Place the protective guard (5) on the spindle collar. Adjust
the position of the protective guard (5) to the requirements
of the operation and lock the protective guard (5) with the
locking screw (6).
Adjust the protective guard (5) such that sparking in
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the direction of the operator is prevented.
Protective guard for cutting
Always use the protective guard for cutting (13) when
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cutting bonded abrasives.
Provide sufficient dust extraction when cutting stone.
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The protective guard for cutting (13) is fitted in the same
way as the protective guard for grinding (5).
Low-vibration auxiliary handle
The low-vibration auxiliary handle reduces vibration, en-
abling the tool to be used safely and more comfortably.
Do not operate your power tool without the side
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handle (3).
Do not make any alterations of any kind to the auxili-
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ary handle.
Do not continue to use a damaged auxiliary handle.
Hand guard
Always fit the hand guard (15) when working with the
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rubber sanding pad (17) or with the cup brush/disc
brush/flap disc.
Attach the hand guard (15) to the side handle (3).
Fitting the abrasive tools
Pull the plug out of the socket before carrying out any
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work on the power tool.
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.
Clean the grinding spindle (4) and all the parts to be fitted.
Lock the grinding spindle with the spindle lock button (1)
before clamping and releasing the abrasive tools.
Do not press the spindle lock button while the grind-
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ing spindle is moving. The power tool may become dam-
aged if you do this.
1 609 92A 438 | (26.11.2018)
Screw the auxiliary handle
(3) on the right or left of the
machine head depending
on the working method.
Grinding/cutting disc
Pay attention to the dimensions of the abrasive tools. The
diameter of the hole must match that of the hub flange. Do
not use an adapter or reducer.
When using diamond cutting discs, make sure that the arrow
indicating the direction of rotation on the diamond cutting
disc matches the direction of rotation of the power tool (see
the direction of rotation arrow on the machine head).
See the graphics page for fitting instructions.
To fasten the grinding/cutting disc, screw on the clamping
nut (9) and tighten with the two-pin spanner; see the "Quick-
clamping nut" section.
After fitting the abrasive tool, check that the abrasive
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tool is fitted correctly and can turn freely before
switching on the power tool. Make sure that the abras-
ive tool does not brush against the protective guard or
other parts.
A plastic part (O-ring) is fitted around the cent-
ring collar in the hub flange (7). If the O-ring
is missing or damaged, the hub flange (7)
must be replaced before operation can re-
sume.
Flap disc
Always fit the hand guard (15) when working with the
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flap disc.
Rubber sanding pad
Always fit the hand guard (15) when working with the
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rubber sanding pad (17).
See the graphics page for fitting instructions.
Before fitting the rubber sanding pad (17), place the two
spacer discs (16) on the grinding spindle (4).
Screw on the round nut (19) and tighten with the two-pin
spanner.
Cup brush/disc brush
Always fit the hand guard (15) when working with the
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cup brush or disc brush.
See the graphics page for fitting instructions.
The cup brush/disc brush 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/disc brush with an open-ended spanner.
Quick-clamping nut
To change the abrasive tool easily without having to use any
additional tools, you can use the quick-clamping nut (11) in-
stead of the clamping nut (9).
The quick-clamping nut (11) may be used only for
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grinding or cutting discs.
Only use quick-clamping nuts (11) that are in good work-
ing order and not damaged.
When screwing on, make sure that the printed side of the
quick-clamping nut (11) is not facing the grinding disc;
the arrow must be pointing towards the index mark (24).
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