Dust/Chip Extraction; Operating Modes - Bosch GKS Professional 85 Bedienungsanleitung/Originalbetriebsanleitung

18 | English
– Use the hex key (19) to undo the clamping bolt (20) in ro-
tational direction ➊.
– Swing the retracting blade guard (12) back and hold on
to it firmly.
– Remove the clamping flange (21) and the saw blade (22)
from the saw spindle (24).
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 (22) 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 (22) on the mounting flange (23).
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 (21) and screw in the clamp-
ing bolt (20) in rotational direction ➋. Ensure that the
mounting flange (23) and clamping flange (21) are in-
stalled in the correct position.
– Press and hold the spindle lock button (5).
– Use the hex key (19) to tighten the clamping bolt (20) in
rotational direction ➋. The tightening torque should be
10–12 Nm, which corresponds to hand-tight plus ¼ turn.
Adjusting the riving knife (see figure B)
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Always work with the riving knife, except when mak-
u
ing plunge cuts. The riving knife prevents the saw blade
from jamming while sawing.
Adjustment is carried out at the minimum cutting depth (see
"Setting the cutting depth (see figure D)", page 18).
We recommend that you place the power tool down on the
front side of the protective guard (1).
Loosen the clamping lever (28), pull the saw away from the
base plate (14) and retighten the clamping lever (28).
Loosen the screw (25), set the riving knife (13) to the di-
mension specified in the figure and tighten the screw (25)
with a tightening torque of 8–9 Nm.
Removing/fitting the riving knife
To remove the riving knife (13), loosen the screw (25) and
take off the riving knife (13).
To fit the riving knife (13), insert it and secure using the
screw (25). Then check the riving knife adjustment as de-
scribed above.

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
1 609 92A 4PY | (02.02.2021)
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
u
easily ignite.
Fitting the dust extraction adapter (see figure C)
GKS 85:
Push the dust extraction adapter (26) onto the chip ejector
(17) until it clicks into place. Then secure the dust extraction
adapter (26) in place with the screw (27).
A dust extraction hose with a diameter of 35 mm can be con-
nected to the dust extraction adapter (26).
GKS 85 G:
Push the dust extraction adapter (26) onto the chip ejector
(17) until it clicks into place.
A dust extraction hose with a diameter of 35 mm can be con-
nected to the dust extraction adapter (26).
The dust extraction adapter must only be fitted if an
u
external dust extraction system is connected. Other-
wise the extraction duct can become clogged.
No dust bags should be connected to the dust extrac-
u
tion adapter. Otherwise the extraction system can be-
come clogged.
To ensure optimum extraction, the dust extraction adapter
(26) must be cleaned regularly.
External dust extraction
Connect the extraction hose (33) 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
Pull the plug out of the socket before carrying out any
u
work on the power tool.

Operating modes

Setting the cutting depth (see figure D)
Adapt the cutting depth to the thickness of the work-
u
piece. A space of less than the height of one full tooth
should be visible under the workpiece.
Bosch Power Tools