Bosch PWS 550 Operating Instructions Manual page 10

2 609 000 397.book Seite 6 Donnerstag, 26. August 2004 1:27 13
3
Approved Grinding Tools
All grinding tools mentioned in these operating in-
structions 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 b
d
100 6
115 6
D
125 6
b
100 –
D
115 –
125 –
d
70 30
b
75 30
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 1
forward.
To lock-on, press the On/Off switch 1 down at
the front until it engages.
19 • 2 609 000 397 • TMS • 20.08.04
A properly tightened
undamaged, quick-
clamping nut can be
loosened by hand
turning the knurled
ring by hand in an an-
ticlockwise 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.
[mm]
d [rpm] [m/s]
16.0 11 000 80
22.2 11 000 80
22.2 11 000 80
– 11 000 80
– 11 000 80
– 11 000 80
M 10 11 000 45
M 14 11 000 45
English - 6
To switch off the machine, release the On/Off
switch 1 or, when the switch is locked, briefly
press down the On/Off switch 1 at the rear.
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.
Constant Electronic Control
(PWS 9-125 CE)
Constant electronic control holds the speed con-
stant at no-load and under load, and ensures uni-
form working performance.
Overload Protection (PWS 9-125 CE)
When overloaded, the motor comes to a stop.
Relieve the load on the machine immediately and
allow to cool for approx. 30 seconds at the high-
est no-load speed.
Speed Preselection
(PWS 9-125 CE)
Preselect the required speed using the thumb
wheel 2 according to the table following the sec-
tion "Tool Specifications" (reference values).
Operating Instructions
Clamp the workpiece if it does not remain sta-
tionary due to its own weight.
Do not strain the machine so heavily that it
comes to a standstill.
Grinding and cutting discs become very hot
while working; do not touch until they have
cooled.
Rough Grinding
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.
Never use a cutting disc for roughing.