Bosch GWS Professional 18 V-LI Manual Original página 29

Clean the grinding spindle (8) and all the parts to be
fitted. Lock the grinding spindle with the spindle lock
button (2) before clamping and releasing the abrasive
tools.
 Do not press the spindle lock button while the
grinding spindle is moving. The power tool may
become damaged if you do this.
Grinding/cutting disc
Pay attention to the dimensions of the abrasive tools.
The diameter of the hole must match that of the
mounting flange. Do not use an adapter or reducer.
When using diamond cutting discs, ensure that the
arrow indicating the direction of rotation on the
diamond cutting disc matches the direction of rotation
of the power tool (see the direction of rotation arrow on
the machine head). See the graphics page for assembling
instructions.
To fasten the grinding/cutting disc, screw on the
clamping nut (13) and tighten with the two-pin spanner;
see the Quick-clamping nut section.
 After fitting the abrasive tool, check that the
abrasive tool is fitted correctly and can turn freely
before switching on the power tool. Make sure that
the abrasive tool does not brush against the
protective guard or other parts.
A plastic part (O-ring) is fitted around the
centring collar in the mounting flange (11).
If the O-ring is missing or damaged, the
mounting flange (11) must be replaced
before operation can resume.
Flap disc  Always fit the hand guard (18) when
working with the
flap disc.
Rubber sanding pad  Always fit the hand guard (18)
when working with the rubber sanding pad (19).
See the graphics page for fitting instructions.
Screw on the round nut (21) and tighten with the two-
pin spanner.
Cup brush/disc brush  Always fit the hand guard (18)
when working with the cup brush or disc brush.
See the graphics page for fitting instructions. The cup
brush/disc brush must be screwed onto the grinding
spindle until it rests firmly against the grinding spindle
flange at the end of the grinding spindle thread. Tighten
the cup brush/disc brush with an open-ended spanner.
Quick-clamping nut
To change the abrasive tool easily without having to use
any additional tools, you can use the quick-clamping nut
(14) instead of the clamping nut (13).
 The quick-clamping nut (14) may be used only for
grinding or cutting discs.
Only use quick-clamping nuts (14) that are in good
working order and not damaged.
Bosch Power Tools
English | 29
When screwing on, make sure that the printed side of
the quick-clamping nut (14) is not facing the grinding
disc; the arrow must be pointing towards the index
mark (26).
two‑pin spanner as shown in the figure.
Approved abrasive tools
You can use all the abrasive tools mentioned in these
operating instructions.
The permissible speed [min
speed [m/s] of the abrasive tools used must at least
match the values given in the table.
It is therefore important to observe the permissible
rotational/circumferential speed on the label of the
abrasive tool.
Press the spindle lock
button (2) to lock the
grinding spindle. To
tighten the quick-
clamping nut, turn the
grinding disc firmly
clockwise.
If the quick-clamping nut
has been attached
correctly and is not
damaged, you can loosen
it by hand by turning the
knurled ring
anticlockwise. If the
quickclamping nut is
stuck, do not attempt to
loosen it with pliers –
always use the two-pin
spanner. Position the
-1 ] or the circumferential
max. [mm] [mm]
D b d [min
1 609 92A 5C4 | (04.03.2020)
-1 ] [m/s]