Working Advice - Bosch Professional GKS 235 Manual Original

OBJ_BUCH-344-006.book Page 32 Monday, January 23, 2017 8:52 AM
32 | English
Adjusting the Cutting Angle
It is best to place the machine on the face side of the blade
guard 1.
Loosen the wing bolts 7 and 15. Tilt the saw sidewards. Ad-
just the desired measure on the scale 6. Tighten the wing
bolts 7 and 15 again.
Note: For bevel cuts, the cutting depth is smaller than the set-
ting indicated on the cutting-depth scale 26.
Cutting Marks
45° 0°
The 0° cutting mark 10 indicates the position of the saw blade
for right-angled cuts. The 45° cutting mark 9 indicates the po-
sition of the saw blade for 45° cuts.
For precise cuts, position the circular saw against the work-
piece as shown in the figure. It is best to carry out a trial cut.
Starting Operation
 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Switching On and Off
To start the machine, press the On/Off switch 3 and keep it
pressed.
To lock the pressed On/Off switch 3, push the lock-on button
2 toward the right or left.
To switch off the machine, release the On/Off switch 3 or
when it is locked with the lock-on button 2, briefly press the
On/Off switch 3 and then release it.
To save energy, only switch the power tool on when using it.

Working Advice

Protect saw blades against impact and shock.
Guide the machine evenly and with light feed in the cutting di-
rection. Excessive feed significantly reduces the service life of
the saw blade and can cause damage to the power tool.
Sawing performance and cutting quality depend essentially
on the condition and the tooth form of the saw blade. There-
fore, use only sharp saw blades that are suited for the material
to be worked.
 Before any work on the machine itself, pull the mains
plug.
Sawing Wood
The correct selection of the saw blade depends on the type
and quality of the wood and whether lengthway or crossway
cuts are required.
1 609 92A 35X | (23.1.17)
When cutting spruce lengthways, long spiral chips are
formed.
Beech and oak dusts are especially detrimental to health.
Therefore, work only with dust extraction.
Sawing with Parallel Guide (see figure D)
The parallel guide 11 enables exact cuts along a workpiece
edge and cutting strips of the same dimension.
Loosen wing bolt 8 and slide the scale of the parallel guide 11
through the guide in the base plate 14. Adjust the desired cut-
ting width as the scale setting at the respective cutting mark
10 or 9; see Section "Cutting Marks". Tighten wing bolt 8
again.
Sawing with Auxiliary Guide (see figure E)
45° 0°
For sawing large workpieces or straight edges, a board or
strip can be clamped to the workpiece as an auxiliary guide;
the base plate of the circular saw can be guided alongside the
auxiliary guide.
Sawing with Guide Rail (see figures F–H)
The guide rail 28 is used to carry out straight cuts.
The adhesive coating prevents the guide rail from slipping and
protects the surface of the workpiece. The coating of the
guide rail allows the circular saw to glide easily.
For sawing at a right angle, the circular saw can be placed di-
rectly onto the guide rail 28. Fasten the guide rail 28 with suit-
able clamping devices, e. g., screw clamps, on the workpiece
in such a manner that the narrow leg of the guide rail 28 faces
toward the saw blade.
The guide rail 28 must not extend beyond the face side of
the workpiece where the cut is to be started.
The guide-rail adapter 31 is required for bevel cuts with the
guide rail 28. The guide-rail adapter 31 is mounted in the
same manner as the parallel guide 11.
The rubber lip on the guide rail acts as a splinter guard; it pre-
vents fraying of the surface while sawing wooden materials.
For this, the teeth of the saw blade must face directly against
the rubber lip.
The following work steps are required for exact cuts using the
guide rail 28:
– Place the guide rail 28 on to the workpiece projecting light-
ly over the side. Pay attention that the side with the rubber
lip faces to the workpiece.
– Set the circular saw with the premounted guide-rail adapt-
er 31 on to the guide rail 28.
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