Maintenance And Service; Maintenance And Cleaning - Bosch GST 75 BE PROFESSIONAL Originalbetriebsanleitung

OBJ_BUCH-171-001.book Page 19 Thursday, June 22, 2006 12:54 PM
With the thumbwheel for stroke rate preselection 5,
the stroke rate can be preset and changed during
operation.
1–2: Low stroke rate
3–4: Medium stroke rate
5–6: High stroke rate
The required stroke rate is dependent on the material
and the working conditions and can be determined by
a practical trial.
Reducing the stroke rate is recommended when the
saw blade engages in the material as well as when
sawing plastic and aluminium.
Operating Instructions
When working small or thin work pieces,
always use a sturdy support or a saw table
(accessory).
Check wood, press boards, building materials, etc. for
foreign objects such as nails, screws or similar, and
remove them, if required.
Plunge Cutting (see figure H)
The plunge cutting procedure is only suita-
ble for treating soft materials such as wood,
plaster board or similar! Do not work metal
materials with the plunge cutting procedure!
Use only short saw blades for plunge cutting. Plunge
cutting is possible only with the mitre angle set at 0°.
Place the machine with the front edge of the base
plate 7 on to the workpiece without the saw blade 11
touching the workpiece and switch on. For machines
with stroke rate control, 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 7 fully lays on the workpiece,
continue sawing along the desired cutting line.
Parallel Guide with Circle Cutter (Accessory)
For cuts using the parallel guide with circle cutter 26
(accessory), the thickness of the material must not
exceed a maximum of 30 mm.
Parallel Cuts (see figure J): Loosen the locking screw
25 and slide the scale of the parallel guide through the
lead 24 in the base plate. Set the desired cutting
width as the scale value on the inside edge of the
base plate. Tighten the locking screw 25.
Circular Cuts (see figure K): Set the locking screw 25
to the other side of the parallel guide. Slide the scale
of the parallel guide through the lead 24 in the base
plate. Drill a hole in the workpiece centred in the sec-
tion to be sawn. Insert the centring tip 27 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 25.
2 609 932 539 • 22.6.06
Coolant/Lubricant
When sawing metal, coolant/lubricant should be
applied alongside cutting line because of the material
heating up.
Soft Grip
The gripping surface (soft grip) 3 reduces the danger
of slipping and thereby improves the grip on the
machine and the handling.
At the same time, the rubber coating achieves a vibra-
tion-reducing effect.

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 mal-
functions. Therefore, do not saw materials that pro-
duce a lot of dust from below or overhead.
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
degraded. 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 10 occasionally with a drop
of oil.
Check the guide roller 10 regularly. If worn, it must be
replaced through an authorised Bosch after-sales
service agent.
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