Bosch GKS Professional Series Original Instructions Manual page 9

Inserting/changing the circular saw blade
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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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 on the power tool.
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 (5).
Do not press the spindle lock button (5) while the saw
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spindle is moving. The power tool may become damaged
if this happens.
– Use the hex key (17) to undo the clamping bolt (18) in ro-
tational direction ➊.
– Swing the retracting blade guard (12) back and hold on
to it firmly.
– Remove the clamping flange (19) and the saw blade (20)
from the saw spindle (22).
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 (20) 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 (20) on the mounting flange (21).
The cutting direction of the teeth (direction of the arrow
on the saw blade) must match the rotational direction of
the arrow on the protective guard (1).
– Attach the clamping flange (19) and screw in the clamp-
ing bolt (18) in rotational direction ➋. Ensure that the
mounting flange (21) and clamping flange (19) are in-
stalled in the correct position.
– Press and hold the spindle lock button (5).
– Use the hex key (17) to tighten the clamping bolt (18) in
rotational direction ➋. The tightening torque should be
10–12 Nm, which corresponds to hand-tight plus ¼ turn.
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
Bosch Power Tools
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.
Fitting the dust extraction adapter (see figure B)
Push the dust extraction adapter (24) onto the chip ejector
(16) until it clicks into place. Then secure the dust extraction
adapter (24) in place with the screw (23).
A dust extraction hose with a diameter of 35 mm can be con-
nected to the dust extraction adapter (24).
The dust extraction adapter must only be fitted if an
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external dust extraction system is connected. Other-
wise the extraction duct can become clogged.
No dust bags should be connected to the dust extrac-
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tion adapter. Otherwise the extraction system can be-
come clogged.
To ensure optimum extraction, the dust extraction adapter
(24) must be cleaned regularly.
External dust extraction
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 vacuuming dry dust that is especially detrimental to
health or carcinogenic, use a special dust extractor.
In Germany, wood dust extraction requires extraction
devices which have been tested on the basis of TRGS 553;
self-generated dust extraction must not be used in the com-
mercial sector. Commercial operators must clarify the spe-
cific requirements for other materials with the responsible
trade association.
Operation
Operating modes
Pull the plug out of the socket before carrying out any
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work on the power tool.
Setting the cutting depth (see figure C)
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.
Loosen the clamping lever (25). For a smaller cutting depth,
pull the saw away from the base plate (14); for a larger cut-
English | 9
1 609 92A 4BR | (19.09.2018)