Bosch GWS 21-180 HV PROFESSIONAL Instrucciones De Servicio página 19

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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
D
230
b
180
D
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.
20 • 1 609 929 F55 • TMS • 18.12.03
[mm]
b
d
[rpm]
8
22.2
8 500
8
22.2
6 500
8 500
6 500
30
M 14 8 500
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.
Reduced Starting Current
(Type J)
As a result of soft starting, a 13 A fuse is
adequate.
A machine without reduced starting current
requires higher fuse protection (use at least
[m/s]
a 13 A time-delay fuse).
80
Operating Instructions
80
Clamp the workpiece if it does not remain
80
stationary due to its own weight.
80
Do not strain the machine so heavily that it
comes to a standstill.
Grinding and cutting discs become very
45
hot while working; do not touch until they
have cooled.
Rough Grinding
Never use a cutting disc for roughing.
Flap Disc
With the flap disc (accessory), curved surfaces
and profiles (contour sanding) can be worked.
Flap discs have a considerably higher service life
than sanding sheets, lower noise level and lower
sanding temperatures.
English - 6
The best roughing results are
achieved when setting the machine
at an angle of 30° to 40°. Move the
machine back and forth with mod-
erate pressure. In this manner, the
workpiece will not become too hot,
does not discolour and no grooves
are formed.

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