Bosch Professional GCO 230 Original Instructions Manual page 11

The dust from materials such as lead paint, minerals and
metal can be harmful to human health. Touching or breath-
ing in this dust can trigger allergic reactions and/or cause
respiratory illnesses in the user or in people in the near vicin-
ity.
Certain kinds of metal dust are hazardous, especially in com-
bination with alloys such as zinc, aluminium or chrome. Ma-
terials containing asbestos may only be machined by special-
ists.
– Provide good ventilation at the workplace.
– It is advisable to wear a P2 filter class breathing mask.
The regulations on the materials being machined that apply
in the country of use must be observed.
The cutting disc can become blocked by dust, chips or frag-
ments of the workpiece in the recess of the base plate (11).
– Switch the power tool off and pull the mains plug out of
the socket.
– Wait until the cutting disc has come to a complete stop.
– Tilt the power tool backwards so that small pieces of the
workpiece can fall out of the opening designed for this
purpose.
If necessary, use a suitable tool to remove all the pieces of
workpiece.
Avoid dust accumulation at the workplace. Dust can
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easily ignite.
Position of the operator (see figure F)
Do not stand in front of the power tool in line with the
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cutting disc. Always stand to the side of the cutting
disc. If the cutting disc breaks, your body is more protec-
ted from possible splinters in this position.
Switching on/off
– To start the tool, press the on/off switch (1) and keep it
pressed.
– To switch off, release the on/off switch (1).
Practical advice
General advice on using cutting discs
Do not touch the cutting disc after use until it has
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cooled. The cutting disc becomes very hot during use.
Make sure that the spark guard plate (17) is fitted
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properly. Flying sparks are created when sanding metals.
Protect the cutting disc against impact, shock and grease.
Do not subject the cutting disc to lateral pressure.
Do not load the power tool so heavily that it comes to a stop.
Excessive feed significantly reduces the performance of the
power tool and the service life of the cutting disc.
Only use cutting discs that are suitable for the material being
machined.
Permissible workpiece dimensions
Maximum workpiece dimensions (in mm)
Bosch Power Tools
Workpiece shape
0°
Dia. 129
120 x 120
100 x 200
137 x 137
Minimum workpiece dimensions
(= all workpieces which can still be clamped in place with the
locking spindle (7)): Length 80 mm
Maximum cutting depth (0°/0°): 129 mm
Cutting metal
– Set the required mitre angle as necessary.
– Firmly clamp the workpiece as appropriate for its dimen-
sions.
– Switch on the power tool.
– Slowly guide the tool arm downwards using the handle
(2).
– Cut the workpiece, applying uniform feed.
– Switch off the power tool and wait until the cutting disc
has come to a complete stop.
– Slowly guide the tool arm upwards.
Transport
– Always carry the power tool by the transport handle (15).
Only use the transport devices to transport the power
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tool and never the protective devices.
Maintenance and Service
Maintenance and Cleaning
Pull the plug out of the socket before carrying out any
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work on the power tool.
To ensure safe and efficient operation, always keep
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the power tool and the ventilation slots clean.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
Clean the air vents on your power tool regularly. The
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motor's fan will draw the dust inside the housing and ex-
cessive accumulation of powdered metal may cause elec-
trical hazards.
English | 11
Mitre angle
45°
Dia. 128
110 x 110
107 x 115
115 x 115
1 609 92A 8VC | (13.11.2023)