Bosch GWS 20-230 H Professional Original Instructions Manual page 14

14 | English
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 (30).
(30)
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.
1 609 92A 434 | (23.11.2018)
Press the spindle lock but-
ton (1) to lock the grinding
spindle. To tighten the
quick-clamping nut, turn
the grinding disc firmly
clockwise.
If the quick-clamping nut
has been attached correctly
and is not damaged, you
can loosen it by hand by
turning the knurled ring an-
ticlockwise. If the quick-
clamping nut is stuck, do
not attempt to loosen it
with pliers – always use
the two-pin spanner. Posi-
tion the two‑pin spanner as
shown in the figure.
Grinding/cutting disc
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
u
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).
(GWS 20-230 H / GWS 22-180 H / GWS 22-230 H/JH /
GWS 24-180 H / GWS 24-230 H/JH / GWS 26-180 H /
GWS 26-230 B/H).
Screw on the round nut (19) and tighten with the two-pin
spanner.
Note: Expect more force to be required to loosen the round
nut (19) (GWS 24‑230 JVX).
Cup brush/disc brush
Always fit the hand guard (15) when working with the
u
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.
Note: Expect more force to be required to loosen the grind-
ing tool (GWS 24‑230 JVX).
Approved abrasive tools
You can use all the abrasive tools mentioned in these operat-
ing instructions.
The permissible speed [rpm] or the circumferential speed
[m/s] of the abrasive tools used must at least match the val-
ues given in the table.
It is therefore important to observe the permissible rota-
tional/circumferential speed on the label of the abrasive
tool.
max. [mm]
D b
180 8
230 8
180 –
D
230 –
d
100 30
b
D
Turning the main handle
(GWS 24-230 JVX / GWS 26-230 B)
Pull the plug out of the socket before carrying out any
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work on the power tool.
[mm]
-1
d [min ] [m/s]
22.2 8500 80
22.2 6500 80
– 8500 80
– 6500 80
M 14 8500 45
Bosch Power Tools