Bosch Professional GCO 230 Original Instructions Manual page 10

10 | English
– Swivel the retracting blade guard (3) backwards as far as
possible and hold it in this position.
– Turn the hex socket screw with flange (20) using the hex
key (14) provided while pressing the spindle lock (4) un-
til it engages.
– Press and hold the spindle lock and turn the hex socket
screw with flange (20) anticlockwise.
– Remove the clamping flange (19).
– Remove the cutting disc (5).
Fitting the cutting disc
If required, clean all the parts you want to fit before installing
them.
– Place the new cutting disc on the tool spindle (18) such
that the sticker points away from the tool arm.
– Fit the clamping flange (19) and hex socket screw with
flange (20). Press the spindle lock (4) until it engages
and retighten the hex socket screw with flange by turning
it clockwise using the hex key (14) provided. (Tightening
torque approx. 20–25 Nm)
– Slowly guide the retracting blade guard (3) all the way
down until the cutting disc is completely covered.
– Make sure that the retracting blade guard (3) is working
properly.
The retracting blade guard must always be able to move
freely and retract automatically.
After fitting the cutting disc, check that the cutting disc is fit-
ted correctly and can turn freely before switching on the
power tool.
– Make sure that the cutting disc does not brush against the
retracting blade guard (3), the fixed protective guard
(16) or any other parts.
– Put the power tool into operation for approx. 30 seconds.
If there is substantial vibration, switch the power tool off
immediately, remove the cutting disc and then refit it.
Operation
Pull the plug out of the socket before carrying out any
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work on the power tool.
Transport Safety Lock (see figure C)
The transport safety lock (13) makes it easier to handle the
power tool when transporting it to various working locations.
Unlocking the power tool (work position)
– Press the tool arm down slightly by the handle (2) to re-
lease the transport safety lock (13).
– Pull the transport safety lock (13) all the way out.
– Slowly guide the tool arm upwards.
Notes:
– Make sure that the transport safety lock is not pushed in
when working, otherwise the tool arm will not be able to
be swivelled to the required depth.
– If the transport safety lock is stiff when pulling/pushing, it
should be lubricated so that it can move smoothly.
1 609 92A 8VC | (13.11.2023)
Locking the power tool (transport position)
– Guide the tool arm downwards until you can press the
transport safety lock (13) all the way in.
– Lubricate the transport safety lock regularly.
Further information about transporting (see "Transport",
page 11).
Setting the Mitre Angle (see figure D)
The mitre angle can be set between 0° and 45°.
Important settings are marked with corresponding markings
on the angle guide (6). The 0° and 45° positions are secured
by the respective end stop.
– Loosen the locking screws (12) on the angle guide using
the hex key (14) (8 mm) provided.
– Set the required angle and retighten both locking screws
(12).
Moving the angle guide
If you want to cut wider workpieces, you can move the angle
guide (6) backwards.
– Completely unscrew the locking screws (12) using the
hex key provided (14) (8 mm).
– Move the angle guide (6) backwards by one or two holes
to the required distance.
– Set the required angle and retighten both locking screws
(12).
Clamping the workpiece (see figure E)
To ensure maximum safety while working, the workpiece
must always be firmly clamped.
Do not saw workpieces that are too small to clamp firmly.
The free end of long workpieces must have something
placed underneath it or be supported.
– Place the workpiece against the angle guide (6).
– Slide the locking spindle (7) against the workpiece and
clamp the workpiece in place using the spindle handle
(9).
Releasing the workpiece
– Release the spindle handle (9).
– Open the quick release (8) and pull the locking spindle
(7) away from the workpiece.
Start-up
Pay attention to the mains voltage. The voltage of the
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power source must match the voltage specified on the
rating plate of the power tool.
Products that are only sold in AUS and NZ: Use a resid-
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ual current device (RCD) with a nominal residual current
of 30 mA or less.
Check the cutting disc before using it. The cutting disc
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must be fitted properly and be able to rotate freely.
Carry out a test run for at least 30 seconds with no
load. Do not use cutting discs that are damaged, run
untrue or vibrate during use. Damaged cutting discs can
shatter and cause injuries.
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