Bosch GWS 27-230 J Professional Notice Originale page 23

If the quick-clamping nut has been at-
tached correctly and is not damaged,
you can loosen it by hand by turning
the knurled ring anticlockwise. If the
quick-clamping nut is stuck, do not
attempt to loosen it with pliers – al-
ways use the two-pin spanner. Posi-
tion the two‑pin spanner as shown in
the figure.
Approved abrasive tools
You can use all the abrasive tools mentioned in these operat-
ing instructions.
-1
The permissible speed [min ] or the circumferential speed
[m/s] of the abrasive tools used must at least match the val-
ues given in the table.
It is therefore important to observe the permissible rota-
tional/circumferential speed on the label of the abrasive
tool.
max. [mm] [mm]
D b s
180 8 – 22.2
230 8 – 22.2
180 4.2 – 22.2
230 4.2 – 22.2
180 – –
230 – –
100 27 – M 14
125 30 – M 14
180 26 – M 14
180 20 – 22.2
125 – – M 14
83 – – M 14
180 3.0 7 22.2
s 230 3.0 7 22.2
α
Operation
Do not load the power tool so heavily that it comes to a
u
stop.
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Exercise caution when cutting slots in structural walls;
u
see the "Information on structural design" section.
Bosch Power Tools
[°]
-1
d α [min ] [m/s]
– 8500 80
– 6500 80
– 8500 80
– 6500 80
– – 8500 80
– – 6500 80
– 8500 80
– 6500 80
– 8500 80
– 8500 80
– 8500 80
– 8500 80
> 0 8500 80
> 0 6500 80
Clamp the workpiece if it is not secure under its own
u
weight.
If the power tool has been subjected to a heavy load,
u
continue to run it at no-load for several minutes to
cool down the accessory.
Do not use the power tool with a cut-off stand.
u
Do not touch grinding and cutting discs until they have
u
cooled down. The discs can become very hot while work-
ing.
Working advice
Rough grinding
Always use the protective guard for grinding (5) when
u
rough grinding with bonded abrasives.
Never use cutting discs for rough grinding.
u
When rough grinding, the protective guard for
u
cutting (13) or the protective guard for grinding (5)
with a fitted cover for cutting (24) can impact the
workpiece and lead to a loss of control.
The best rough grinding results are achieved with a set angle
of 30° to 40°. Move the power tool back and forth with mod-
erate pressure. This will ensure that the workpiece does not
become too hot or discolour and that grooves are not
formed.
The protective guard for cutting (13) or the protective
u
guard for grinding (5) with a fitted cover for cutting (24)
must be used when using bonded discs which are ap-
proved for cutting and grinding.
Surface grinding with flap disc
Always use the protective guard for grinding (5) when
u
grinding with the flap disc.
The flap disc (accessory) enables you to machine curved
surfaces and profiles. Flap discs have a considerably longer
service life, lower noise levels and lower grinding temperat-
ures than conventional grinding discs.
Surface grinding with sanding disc
Always fit the hand guard (19) when working with the
u
rubber sanding pad (20).
Grinding with a sanding disc can be done without a protect-
ive guard.
See the graphics page for fitting instructions.
Screw on the round nut (22) and tighten it with the two-pin
spanner.
Cup brush/disc brush/conical brush
Always use the protective guard for grinding (5) when
u
brushing with disc brushes. Brushing with cup
brushes/conical brushes can be performed without
the protective guard.
Always fit the hand guard (19) when working with the
u
cup brush or conical brush.
The wires of the disc brush can get caught on the pro-
u
tective guard and break, if the maximum permitted di-
mensions of the disc brushes are exceeded.
English | 23
1 609 92A 9L8 | (11.04.2024)