Bosch GST Professional 14,4 V-LI Original Instructions Manual page 17

OBJ_BUCH-1257-003.book Page 17 Monday, November 12, 2012 3:46 PM
The orbital action can be adjusted with the adjusting lever 8,
even during operation.
No orbital action
Small orbital action
Medium orbital action
Large orbital action
The optimal orbital action setting for the respective applica-
tion can be determined through practical testing. The follow-
ing recommendations apply:
– Select a lower orbital action setting (or switch it off) for a
finer and cleaner cutting edge.
– For thin materials such as sheet metal, switch the orbital
action off.
– For hard materials such as steel, work with low orbital
action.
– For soft materials and when sawing in the direction of the
grain, work with maximum orbital action.
Adjusting the Cutting Angle (see figure H)
The base plate 7 can be swivelled by 45° to the left or right for
mitre cuts.
Remove the vacuum connection 18.
Loosen screw 22 with Allen key 5 and slide the base plate 7 in
toward the battery 3 to the stop.
For adjustment of precise mitre angles, the base plate has ad-
justment notches on the left and right at 0° and 45°. Swivel
the base plate 7 to the desired position according to the scale
23. Other mitre angles can be adjusted using a protractor.
Afterwards, push the base plate 7 to the stop in the direction
of the saw blade 11.
Tighten the screw 22 again.
The vacuum connection 18 and the splinter guard 20 cannot
be used for bevel cuts.
Offsetting the Base Plate (see figure H)
For sawing close to edges, the base plate 7 can be offset to
the rear.
Loosen screw 22 with Allen key 5 and slide the base plate 7 in
toward the battery 3 to the stop.
Tighten the screw 22 again.
When sawing with the base plate 7 offset, the parallel guide
with circle cutter 25 as well as the splinter guard 20 may not
be used.
Starting Operation
Inserting the battery
 Use only original Bosch lithium ion batteries with the
voltage listed on the nameplate of your power tool. Using
other batteries can lead to injuries and pose a fire hazard.
Insert the charged battery 3 from the rear into the base of the
power tool. Press the battery completely into the base until
the red stripe can no longer be seen and the battery is secure-
ly locked.
Switching On and Off
To start the machine, firstly press on the safety switch 1 next
to the symbol to deactivate it. Then press and hold the
On/Off switch 2.
Bosch Power Tools
To switch off the machine, release the On/Off switch 2. Acti-
vate the safety switch 1 by pressing on it next to the symbol .
Note: For safety reasons, the On/Off switch 2 cannot be
locked; it must remain pressed during the entire operation.
To save energy, only switch the power tool on when using it.
Controlling the Stroke Rate
Increasing or reducing the pressure on the On/Off switch 2
enables stepless stroke-rate control of the switched-on ma-
chine.
Light pressure on the On/Off switch 2 results in a low stroke
rate. Increasing the pressure also increases the 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.
After longer periods of work at low stroke rate, the machine
can heat up considerably. Remove the saw blade from the ma-
chine and allow the machine to cool down by running it for ap-
prox. 3 minutes at maximum stroke rate.
Temperature Dependent Overload Protection
When using the machine as intended for, it cannot be subject to
overload. In case of excessive load or when not within the per-
mitted battery temperature range of 0–70 °C, the speed is re-
duced or the machine switches off. With reduced speed, the
machine will not run at full speed again until after reaching the
permitted battery temperature or when the load is reduced. In
case of automatic shut-off, switch the machine off, allow the
battery to cool down and then switch the machine on again.
Protection Against Deep Discharging
The Lithium-Ion battery is protected against deep discharging
by the "Electronic Cell Protection (ECP)". When the battery is
empty, the machine is switched off by means of a protective
circuit: The inserted tool no longer rotates.
Working Advice
 When sawing small or thin workpieces, always use a
firm support.
Contact Protector
The contact protector 13 attached to the casing prevents ac-
cidental touching of the saw blade during the working proce-
dure and may not be removed.
Plunge Cutting (see figure I)
 Plunge cuts may only be applied to soft materials, such
as wood, gypsum plaster boards, etc.!
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 work-
piece 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.
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1 609 92A 00V | (12.11.12)