Bosch GWS 20-180 Professional Operating Instructions Manual page 10

Quick Clamping Nut
Instead of the clamping nut 11, the quick-clamp-
ing nut 12 (accessory) can be used. Grinding
tools can then be mounted without using tools.
The quick-clamping nut 12 may be used only
for grinding and cutting discs.
Use only a flawless, undamaged quick-clamp-
ing nut 12.
When screwing on, take care that the side
with printing does not point to the grinding
disc. The arrow must point to the index
mark 27.
27
12
2
2
11 • 1 609 929 F75 • 04.03
Lock the grinder
spindle with the spin-
dle lock button 2.
Tighten the quick-
clamping nut by
forcefully turning the
grinding disc in the
clockwise direction.
A properly tightened
undamaged, quick-
clamping nut can be
loosened by hand
turning the knurled
ring in anticlockwise
direction.
Never loosen a tight
quick-clamping nut
with pliers but use a
two-pin spanner. In-
sert the two-pin
spanner as shown in
the illustration.
English - 6
Approved Grinding Tools
All grinding tools mentioned in this operating
manual instruction can be used.
The permissible speed [rpm] or the circumferen-
tial speed [m/s] of the grinding tools used must at
least match the values given in the table.
Therefore, always observe the permissible
rotational/circumferential speed on the label
of the grinding tool.
max.
[mm]
D
d
180
230
D
b
D
180
230
d
100
b
D
Starting Operation
Observe correct mains voltage: The voltage of
the power source must agree with the voltage
specified on the nameplate of the machine.
Equipment marked with 230 V can also be con-
nected to 220 V.
Switching On and Off
To start the machine, press the On/Off switch 3
forward and then down.
To lock-on, push the pressed On/Off switch 3
further forwards.
To switch off the machine, release the On/Off
switch 3 or push and release it then.
Switch version without lock
(country-specific):
To start the machine, press the On/Off switch 3
forward and then down.
To switch off the machine, release the On/Off
switch 3.
Test run!
Check the grinding tool before use. The
grinding tool must be properly mounted
and rotate freely. Perform a test run of at
least 30 seconds without load. Do not use
damaged, out-of-round or vibrating grind-
ing tools.
[mm]
b d [rpm]
8 22.2 8 500
8 22.2 6 500
– – 8 500
– – 6 500
30 M 14 8 500
[m/s]
80
80
80
80
45