Bosch GWS 20-180 Professional Operating Instructions Manual page 9

Mounting the Grinding Tools
Before any work on the machine itself, pull
the mains plug.
Use only grinding tools with a permissi-
ble speed at least as high as the no-load
speed of the machine.
Grinding and cutting discs become very
hot while working; do not touch until
they have cooled.
Clean the grinder spindle and all parts to be
mounted. For clamping and loosening the
grinding tools, lock the grinder spindle 5 with
the spindle lock button 2.
Actuate the spindle lock button 2 only when
the grinder spindle is at a standstill!
Grinding/Cutting Disc
Pay attention to the dimensions of the grinding
disc. The mounting hole diameter must fit the
mounting flange 9 without play. Do not use re-
ducers or adapters.
When using a diamond cutting disc, take care
that the direction-of-rotation arrow on the dia-
mond cutting disc and the direction of rotation of
the machine (direction-of-rotation arrow on the
machine head) agree.
For mounting, see the illustration page.
Screw on the clamping nut 11 and tighten with
the two-pin spanner (see Section "Quick-clamp-
ing Nut").
9
If the O-ring is missing or is damaged, it must
in all cases be
1 600 210 039) before the mounting flange 9 is
mounted.
After mounting the grinding tool and be-
fore switching on, check that the grind-
ing tool is correctly mounted and that it
can turn freely.
10 • 1 609 929 F75 • 04.03
An O-ring (plastic
part) is inserted in
the mounting
flange 9 around the
spigot.
replaced (Order
Flap Disc
Depending on the application, remove the protec-
tion guard 6 and mount the hand guard 18. Place
the special mounting flange 9 (accessory, Order
No. 2 605 703 028) and the flap disc on the
grinder spindle 5. Screw on the clamping nut 11
and tighten with the two-pin spanner.
Rubber Sanding Plate 20
Depending on the application, remove the protec-
tion guard 6 and mount the hand guard 18.
Before mounting the rubber sanding pad 20,
place the 2 spacers 19 onto the grinding spindle.
For mounting, see the illustration page.
Screw on the round nut 22 and tighten with the
two-pin spanner.
Cup Brush 23/Disc Brush
Depending on the application, remove the protec-
tion guard 6 and mount the hand guard 18.
The grinding tool must be able to be screwed
onto the grinding spindle 5 until it rests firmly
against the grinder spindle flange at the end of
the grinder spindle threads. Tighten with an
open-end spanner.
Grinding Cup
When working with grinding cups, use
the special guard 15.
The grinding cup 16 should always protrude
from the guard 15 only as far as absolutely nec-
essary for the work to be performed in each case.
Adjust the guard 15 to this distance.
For mounting, see the illustration page.
Screw on the clamping nut 11 and tighten with
the fitting offset two-pin spanner 17.
No.
English - 5