Bosch GST Professional 120 BE Manual Original página 25

OBJ_BUCH-615-001.book Page 25 Wednesday, January 16, 2008 1:23 PM
Plunge Cutting (see figures I – J)
Plunge cuts may only be applied to soft ma-
terials, such as wood, gypsum plaster
boards, etc.!
Use only short saw blades for plunge cutting.
Plunge cutting is possible only with the mitre an-
gle set at 0°.
Place the machine with the front edge of the
base plate 9 on to the workpiece without the
saw blade 14 touching the workpiece and
switch on. For machines with stroke rate con-
trol, select the maximum stroke rate. Firmly
hold the machine against the workpiece and by
tilting the machine, slowly plunge the saw blade
into the workpiece.
When the base plate 9 fully lays on the work-
piece, continue sawing along the desired cutting
line.
Parallel Guide with Circle Cutter (Accessory)
For cuts using the parallel guide with circle cut-
ter 25 (accessory), the thickness of the material
must not exceed a maximum of 30 mm.
Parallel Cuts (see figure K): Loosen the locking
screw 24 and slide the scale of the parallel guide
through the lead 23 in the base plate. Set the
desired cutting width as the scale value on the
inside edge of the base plate. Tighten the lock-
ing screw 24.
Circular Cuts (see figure L): Set the locking
screw 24 to the other side of the parallel guide.
Slide the scale of the parallel guide through the
lead 23 in the base plate. Drill a hole in the work-
piece centred in the section to be sawn. Insert
the centring tip 26 through the inside opening of
the parallel guide and into the drilled hole. Set
the radius as the scale value on the inside edge
of the base plate. Tighten the locking screw 24.
Coolant/Lubricant
When sawing metal, coolant/lubricant should be
applied alongside cutting line because of the
material heating up.
Bosch Power Tools
Maintenance and Service
Maintenance and Cleaning
Before any work on the machine itself, pull
the mains plug.
For safe and proper working, always keep
the machine and ventilation slots clean.
Clean the saw blade holder regularly. For this,
remove the saw blade from the machine and
lightly tap out the machine on a level surface.
Heavy contamination of the machine can lead to
malfunctions. Therefore, do not saw materials
that produce a lot of dust from below or over-
head.
In extreme working conditions, conductive
dust can accumulate in the interior of the
machine when working with metal. The pro-
tective insulation of the machine can be de-
graded. The use of a stationary extraction
system is recommended in such cases as
well as frequently blowing out the ventila-
tion slots and installing a residual current
device (RCD).
Lubricate the guide roller 13 occasionally with a
drop of oil.
Check the guide roller 13 regularly. If worn, it
must be replaced through an authorised Bosch
after-sales service agent.
WARNING! Important instructions for con-
necting a new 3-pin plug to the 2-wire cable.
The wires in the cable are coloured according to
the following code:
Do not connect the blue or brown wire to the
earth terminal of the plug.
Important: If for any reason the moulded plug is
removed from the cable of this power tool, it
must be disposed of safely.
1 609 929 N44 | (16.1.08)
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