Bosch GWS Professional 20-230 H Notice Originale page 13

OBJ_BUCH-827-008.book Page 14 Monday, October 24, 2016 2:46 PM
14 | English
A properly attached, undam-
aged quick-clamping nut can
be loosened by hand when
turning the knurled ring in an-
ticlockwise direction.
Never loosen a tight quick-
clamping nut with pliers. Al-
ways use the two-pin span-
ner. Insert the two-pin span-
ner as shown in the
illustration.
Grinding/Cutting Disc
Pay attention to the dimensions of the grinding tools. The
mounting hole diameter must fit the mounting flange without
play. Do not use reducers or adapters.
When using diamond cutting discs, pay attention that the di-
rection-of-rotation arrow on the diamond cutting disc and the
direction of rotation of the machine (see direction-of-rotation
arrow on the machine head) agree.
See graphics page for the mounting sequence.
To fasten the grinding/cutting disc, screw on the clamping nut
7 and tighten with the two-pin spanner; see Section "Quick-
clamping Nut ".
 After mounting the grinding tool and before switching
on, check that the grinding tool is correctly mounted
and that it can turn freely. Make sure that the grinding
tool does not graze against the protection guard or oth-
er parts.
A plastic part (O-ring) is fitted around
the centring collar of mounting flange 5.
If the O-ring is missing or damaged,
the mounting flange 5 must be replaced
before resuming operation.
Flap Disc
 For operations with the flap disc, always mount the
hand guard 12.
Rubber Sanding Plate
 For operations with the rubber sanding plate 14,
always mount the hand guard 12.
See graphics page for the mounting sequence.
Before mounting the rubber sanding plate 14, attach the
2 spacer discs 13 to the grinder 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 16 and tighten with the two-pin span-
ner.
Note: Expect more force to be required to loosen the round
nut 16 (GWS 24-230 JVX).
1 609 92A 2C9 | (24.10.16)
Cup Brush/Disc Brush
 For operations with the cup brush/wheel brush, always
mount the hand guard 12.
See graphics page for the mounting sequence.
The cup brush/disc brush must be able to be screwed onto
the grinder spindle until it rests firmly against the grinder
spindle flange at the end of the grinder spindle threads. Tight-
en the cup brush/disc brush with an open-end spanner.
Note: Expect more force to be required to loosen the grinding
tool (GWS 24-230 JVX).
Grinding Cup (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)
 When working with the grinding cup, mount the special
protection guard 24.
The grinding cup 25 should never project further out of the
protection guard 24 than necessary for the respective grind-
ing application. Adjust the protection guard 24 accordingly to
this dimension.
See graphics page for the mounting sequence.
Screw on clamping nut 7 and tighten with two-pin spanner
26.
Approved Grinding Tools
All grinding tools mentioned in these operating instructions
can be used.
-1
The permissible speed [min ] or the circumferential speed
[m/s] of the grinding tools used must at least match the values
given in the table.
Therefore, observe the permissible rotational/circumferen-
tial speed on the label of the grinding tool.
max.
[mm] [mm]
D b d
d
180 8 22.2
D
230 8 22.2
b
D
180
– –
230
d
100 30 M 14
b
D
-1
[min ] [m/s]
8500 80
6500 80
8500 80
6500 80
8500 45
Bosch Power Tools