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

18 | English
Adjusting the Riving Knife (GKS 85 G)
(see figure B)
 Before any work on the machine itself, pull the mains
plug.
 Always work with the riving knife, except when carry-
ing out plunge cuts. The riving knife prevents jamming of
the saw blade while sawing.
Adjustment is carried out at minimal cutting depth, see "Ad-
justing the Cutting Depth", page 18.
It is best to place the machine on the face side of the blade
guard 1.
Loosen the clamping lever 28, pull the saw away from the
base plate 14 and then tighten the clamping lever 28 again.
Loosen screw 25, adjust the riving knife 13 to the measure
shown in the figure and tighten screw 25 with a tightening
torque between 8–9 Nm.
Disassembly/Assembly of the Riving Knife
For disassembly of the riving knife 13, loosen screw 25 and
remove the riving knife 13.
For assembly, insert the riving knife 13 and tighten it with the
screw 25. Afterwards, check the adjustment of the riving
knife as described previously.

Dust/Chip Extraction

 Before any work on the machine itself, pull the mains
plug.
 Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suitable
for the material.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the mate-
rials to be worked.
 Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Mounting the Extraction Adapter (see figure C)
GKS 85:
Attach the extraction adapter 26 onto the chip ejector 17 un-
til it latches. Secure the extraction adapter 26 additionally
with the screw 27.
A vacuum hose with a diameter of 35 mm can be connected to
the extraction adapter 26.
GKS 85 G:
Attach the extraction adapter 26 onto the chip ejector 17 un-
til it latches. A vacuum hose with a diameter of 35 mm can be
connected to the extraction adapter 26.
1 609 92A 14V | (10.2.15)
 The extraction adapter may not be mounted when no
external dust extraction is connected. Otherwise the ex-
traction channel can become clogged.
 Do not connect a dust bag to the extraction adapter.
Otherwise the extraction system can become clogged.
To ensure optimum extraction, the extraction adapter 26
must be cleaned regularly.
External Dust Extraction
Connect the vacuum hose 33 to a vacuum cleaner (accesso-
ry). An overview for connecting to various vacuum cleaners
can be found at the end of this manual.
The machine can be plugged directly into the receptacle of a
Bosch all-purpose vacuum cleaner with remote starting con-
trol. The vacuum cleaner starts automatically when the ma-
chine is switched on.
The vacuum cleaner must be suitable for the material being
worked.
When vacuuming dry dust that is especially detrimental to
health or carcinogenic, use a special vacuum cleaner.
Operation

Operating Modes

 Before any work on the machine itself, pull the mains
plug.
Adjusting the Cutting Depth (see figure D)
 Adjust the cutting depth to the thickness of the work-
piece. Less than a full tooth of the blade teeth should be
visible below the workpiece.
Loosen the clamping lever 28. For a smaller cutting depth,
pull the saw away from the base plate 14; for a larger cutting
depth, push the saw toward the base plate 14. Adjust the de-
sired cutting depth at the cutting-depth scale. Tighten the
clamping lever 28 again.
The tightening tension of the clamping lever 28 can be read-
justed. For this, unscrew the clamping lever 28, and screw it
back again turned offset by at least 30° in anticlockwise direc-
tion.
Adjusting the Cutting Angle
It is best to place the machine on the face side of the blade
guard 1.
Loosen the wing bolts 8 and 16. Tilt the saw sidewards. Ad-
just the desired measure on the scale 6. Tighten the wing
bolts 8 and 16 again.
Note: For bevel cuts, the cutting depth is smaller than the set-
ting indicated on the cutting-depth scale 29.
Cutting Marks
The 0° cutting mark (9) indicates the position of the saw blade
for straight cuts. The 45° cutting mark (10) indicates the po-
sition of the saw blade for 45° cuts without using the guide
rail.
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