Bosch Professional GWS 900 Manual Original página 19

tightening the locking screw (7) using the combination
wrench (4).
Adjust the protective guard (6) such that sparking in
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the direction of the operator is prevented.
Note: The coding cams on the protective guard (6) ensure
that only a protective guard that is suitable for the power
tool can be fitted.
Protective guard for cutting
Always use the protective guard for cutting (13) when
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cutting with 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 (6).
Side handle
Do not operate your power tool without the side
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handle (3).
Screw the side handle (3) on the left or right of the machine
head depending on how your are working.
Hand guard
Always fit the hand guard (15) when working with the
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rubber sanding plate (16) 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 (5) 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.
Grinding/cutting disc
Pay attention to the dimensions of the abrasive tools. The
diameter of the hole must match that of the mounting flange.
Do not use an adapter or reducer.
When using diamond cutting discs, ensure that the arrow in-
dicating 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 assembly instructions.
To fasten the grinding/cutting disc, screw on the clamping
nut (10) and tighten with the combination wrench; see
the (see " 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-
Bosch Power Tools
ive tool does not brush against the protective guard or
other parts.
can resume.
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 (16).
See the graphics page for fitting instructions.
Screw on the round nut (18) and tighten with the combina-
tion wrench (4).
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 (10).
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 (21).
", page 19)
Mounting flange for grinding spindle M 14:
A plastic part (O-ring) is fitted around the cent-
ring collar in the mounting flange (8). If the O-
ring is missing or damaged, the mounting
flange (8) must be replaced before operation
Press the spindle lock but-
ton (1) to lock the grinding
(21)
spindle. To tighten the
quick-clamping nut, turn
the grinding disc firmly
clockwise.
1 609 92A 6FB | (19.02.2021)
English | 19