Dust/Chip Extraction; Operating Modes - Bosch GKS Professional 18V-68 GC Notice Originale

24 | English
Inserting/changing the circular saw blade
Remove the battery from the power tool before carry-
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ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
Wear protective gloves when fitting the saw blade.
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Danger of injury when touching the saw blade.
Only use saw blades that match the specifications
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given in this operating manual and that are tested and
marked in accordance with EN 847-1
The permitted speed of the application tool must be at
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least equal to the maximum speed marked on the
power tool. If accessories run faster than their rated
speed, they may break and fly off.
Do not use abrasive wheels as the application tool un-
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der any circumstances.
Selecting the saw blade
You will find an overview of recommended saw blades at the
end of these operating instructions.
Removing the saw blade (see figure A)
To change tools, we recommend that you place the power
tool down on the front side of the motor housing.
– Press and hold the spindle lock button (10).
Do not press the spindle lock button (10) while the
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saw spindle is moving. The power tool may become
damaged if this happens.
– Use the hex key (31) to undo the clamping bolt (29) in ro-
tational direction ➊.
– Swing the retracting blade guard (12) back and hold on
to it firmly.
– Remove the clamping flange (28) and the saw blade (27)
from the saw spindle (25).
Fitting the saw blade (see figure A)
To change tools, we recommend that you place the power
tool down on the front side of the motor housing.
– Clean the saw blade (27) and all the clamping elements
to be fitted.
– Swing the retracting blade guard (12) back and hold on
to it firmly.
– Place the saw blade (27) on the mounting flange (26).
The cutting direction of the teeth (direction of the arrow
on the saw blade) must match the rotational direction of
the arrow on the retracting blade guard (12).
– Attach the clamping flange (28) and screw in the clamp-
ing bolt (29) in rotational direction ➋. Ensure that the
mounting flange (26) and clamping flange (28) are in-
stalled in the correct position.
– Press and hold the spindle lock button (10).
– Use the hex key (31) to tighten the clamping bolt (29) in
rotational direction ➋. The tightening torque should be
6–9 Nm, which corresponds to hand-tight plus ¼ turn.
1 609 92A 5FB | (24.02.2020)

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.
Avoid dust accumulation at the workplace. Dust can
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easily ignite.
Chip ejector (see figure B)
The chip ejector (18) can turn freely.
An extraction hose with a diameter of 35 mm or a dust/chip
box (32) can be connected to the chip ejector (18).
To ensure optimum extraction, the chip ejector (18) must be
cleaned regularly.
External dust extraction
Connect the extraction hose (42) to a dust extractor (ac-
cessory). You will find an overview of connecting to various
dust extractors at the end of these operating instructions.
The power tool can be directly connected to the socket of a
Bosch all-purpose dust extractor with remote starter. This
dust extractor is started up automatically when the power
tool is switched on.
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.
Operation
Remove the battery from the power tool before carry-
u
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.

Operating modes

Remove the battery before carrying out any work on
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the power tool.
Setting the cutting depth (see figures D–E)
Adapt the cutting depth to the thickness of the work-
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piece. A space of less than the height of one full tooth
should be visible under the workpiece.
Bosch Power Tools