Bosch GCM 254 D Professional Manual Original página 35

Never carry the power tool using the workpiece sup-
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ports.
Only use the transport devices to transport the power
tool.
Stationary or flexible mounting
To ensure safe handling, the power tool must be
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mounted on a flat, stable work surface (e.g. work
bench) before use.
Mounting on a work surface (see figure B1−B2)
– Use suitable screw fasteners to secure the power tool to
the work surface. The holes (9) are used for this purpose.
or
– Firmly clamp the base of the power tool to the work sur-
face with commercially available screw clamps.
Mounting on a Bosch saw stand
With the height-adjustable legs, Bosch GTA saw stands
provide firm support for the power tool on any surface. The
workpiece supports of the saw stand are used for underlay-
ing long workpieces.
Read all the warnings and instructions included with
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the saw stand. Failure to observe the warnings and fol-
low instructions may result in electric shock, fire and/or
serious injury.
Assemble the saw stand properly before mounting the
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power tool. Correct assembly is important to prevent the
risk of collapsing.
– Mount the power tool on the saw stand in the transport
position.
Flexible installation (not recommended) (see figure B3)
If, in exceptional circumstances, it is not possible to mount
the power tool on a flat and stable work surface, you can im-
provise by setting it up with the tilt protector.
Without the tilt protector, the power tool will not be
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stable and can tip over especially when sawing max-
imum mitre and/or bevel angles.
– Rotate the tilt protector (31) inwards or outwards until
the power tool is positioned straight on the work surface.
Dust/Chip Extraction
The dust from materials such as lead paint, some types of
wood, minerals and metal can be harmful to human health.
Touching or breathing in this dust can trigger allergic reac-
tions and/or cause respiratory illnesses in the user or in
people in the near vicinity.
Certain dusts, such as oak or beech dust, are classified as
carcinogenic, especially in conjunction with wood treatment
additives (chromate, wood preservative). Materials contain-
ing asbestos may only be machined by specialists.
– Use a dust extraction system that is suitable for the ma-
terial wherever possible.
– Provide good ventilation at the workplace.
– It is advisable to wear a P2 filter class breathing mask.
The regulations on the material being machined that apply in
the country of use must be observed.
Bosch Power Tools
Avoid dust accumulation at the workplace. Dust can
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easily ignite.
The dust/chip extraction system can be blocked by dust,
chips or fragments of the workpiece.
– Switch the power tool off and pull the mains plug out of
the socket.
– Wait until the saw blade has come to a complete stop.
– Determine the cause of the blockage and eliminate it.
Self-generated dust extraction (see figure C)
For basic chip collection, use a dust bag (46) (accessory).
– Attach the dust bag (46) to the chip ejector (37).
During sawing, the dust bag must not come into contact with
moving tool components.
Always empty the dust bag in good time.
Check and clean the dust bag each time after using.
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When sawing aluminium, remove the dust bag to avoid
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the risk of fire.
External Dust Extraction
You can also attach a dust extraction hose (35 mm dia-
meter) to the chip ejector (37) for extraction.
The dust extractor must be suitable for the material being
worked.
When extracting dry dust that is especially detrimental to
health or carcinogenic, use a special dust extractor.
Changing the saw blade (see figures D1−D4)
Pull the plug out of the socket before carrying out any
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work on the power tool.
Wear protective gloves when fitting the saw blade.
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There is a risk of injury when touching the saw blade.
Only use saw blades that have a maximum permitted speed
higher than the no-load speed of the power tool.
Only use saw blades that match the specifications given in
this operating manual and that have been tested and marked
in accordance with EN 847-1.
Only use saw blades that are recommended by the power
tool manufacturer and are suitable for use on the material
you want to saw. This will prevent the saw teeth overheating
when sawing.
Removing the Saw Blade
– Bring the power tool into the work position.
– Swivel the retracting blade guard (8) to the back and hold
it in this position.
– Turn the hex socket screw (47) with the hex key
(8 mm) (24) and at the same time push the spindle
lock (33) until it engages.
– Keep holding the spindle lock (33) and loosen the hex
socket screw (47) by turning it clockwise (left-hand
thread).
– Remove the clamping flange (48).
– Remove the saw blade (49).
– Slowly push the retracting blade guard back down.
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1 609 92A 88N | (29.03.2023)