Operating Instructions - Bosch GKS 55 PROFESSIONAL Operating Instructions Manual

Operating Instructions

Protect saw blades against impact and shock.
Guide the machine evenly and with light feed in the
cutting direction. Excessive feed significantly reduces
the service life of the saw blade and can cause dam-
age to the power tool.
Sawing performance and cutting quality depend
essentially on the condition and the tooth form of the
saw blade. Therefore, use only sharp saw blades that
are suited for the material to be worked.
Sawing Wood
The correct selection of the saw blade depends on
the type and quality of the wood and whether length-
way or crossway cuts are required.
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 Plastic (GKS 55 CE)
Note: When sawing plastic, especially PVC, long spi-
ral chips are formed that can be electrostatically
charged. This can clog the sawdust ejector 17 and
cause the retracting blade guard 13 to jam. It is best
to work with dust extraction.
Guide the switched on power tool against the work-
piece and carefully start the cut. Continue the cut with
low feed and without interruption, so that the saw
teeth do not gum up too quickly.
Sawing Non-ferrous Metals (GKS 55 CE)
Note: Use only a sharp saw blade that is suitable for
non-ferrous metals. This ensures a clean cut and pre-
vents blade binding.
Guide the switched on power tool against the work-
piece and carefully start the cut. Continue the cut with
low feed and without interruption.
When sawing profiles, always begin the cut from the
narrow side; when sawing U-profiles, never start the
cut from the open side. Support long profiles in order
to avoid blade binding and kickback of the power tool.
Sawing Light Building Materials (Materials with
Mineral Content) (GKS 55 CE)
When sawing light building materials,
observe the statutory provisions and the rec-
ommendations of the material suppliers.
Light building materials may only be sawn dry and
when applying dust extraction. Always work with the
guide rail 28 (accessory).
The vacuum cleaner must be approved for the extrac-
tion of masonry dust. Bosch provides suitable vacuum
cleaners.
22 | English
Sawing with Parallel Guide (see figure D)
The parallel guide 12 enables exact cuts along a work-
piece edge and cutting strips of the same dimension.
Loosen wing bolt 9 and slide the scale of the parallel
guide 12 through the guide in the base plate 15.
Adjust the desired cutting width as the scale setting
at the respective cutting mark 11 or 10; see Section
"Cutting Marks". Tighten wing bolt 9 again.
Sawing with Auxiliary Guide (see figure E)
For sawing large workpieces or straight edges, a
board or strip can 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 slip-
ping 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 directly onto the guide rail 28. Fasten the
guide rail 28 with suitable 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 12.
The rubber lip on the guide rail acts as a splinter guard
that prevents fraying or tearing out of the surface
when 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 pro-
jecting lightly 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 adapter 31 on to the guide rail 28.
1 609 929 K21 • 3.11.06