Bosch GST 120 E PROFESSIONAL Bedienungsanleitung Seite 14

2 609 932 360.book Seite 3 Donnerstag, 11. November 2004 3:12 15
Ejecting the Saw Blade (see figure
When ejecting the saw blade, hold the ma-
chine in such a manner that no persons or
animals can be injured by the ejected saw
blade.
To eject the saw blade, fully press the SDS
clamping lever 16 towards the front; this releases
and ejects the saw blade.
Starting Operation
Observe correct mains voltage: The voltage of
the power source must agree with the voltage
specified on the nameplate of the machine.
Equipment marked with 230 V can also be con-
nected to 220 V.
Switching On and Off
GST 120 BE
To start the machine, press the On/Off switch 3
and keep it depressed.
To lock on, push the lock-on button 2 to the left
or right while the On/Off switch 3 is pressed.
To switch off the machine, release the On/Off
switch 3 or push and release it then.
GST 120 E
To start the machine, press the On/Off switch 3
forward.
To switch the machine off, press the On/Off
switch 3 to the rear.
Electronic Soft Start
The electronic soft start feature increases the
service life of the motor and the mechanical
transmission. After brief soft starting, the ma-
chine reaches the preselected stroke speed.
Stepless Stroke-speed Control
(GST 120 BE)
Lightly pressing the On/Off switch 3 results in low
stroke speed. Applying more pressure increases
the stroke speed.
Stroke Rate Preselection
The required stroke rate can be preselected (also
during operation) using the thumbwheel 4.
1 – 2 = low stroke rate
3 – 4 = medium stroke rate
5 – 6 = high stroke rate
The required stroke rate is dependent on the ma-
terial and the working conditions and can be de-
termined by a practical trial.
14 • 2 609 932 360 • TMS • 19.10.04
) After working for longer periods at low stroke rate
B
allow the machine to cool down by running it at
maximum stroke rate and no-load for approx.
3 minutes.
Contact Protector
The contact protector 14 attached to the housing
prevents unintentional contact with the saw blade
while working and should not be removed.
Sawdust Blower Device
The sawdust blower device leads an air jet to the
saw blade. The air jet keeps sawdust from cover-
ing the cutting line during operation.
The air flow can be switched on or off with the
switch for the sawdust blowing device 9:
Blower effect switched on:
For working with wood, plastic and
similar materials that produce large
amounts of sawdust.
Blower effect switched off:
For working with metals and with
use of coolant/lubricant as well as
when using dust/chip extraction.
Pendulum Action Setting
The four pendulum action settings
allow optimum adaptation of cutting
speed, cutting capacity and cutting
pattern to the material being
sawed.
The pendulum action can be adjusted in four
steps with the adjustment lever 10. Switching is
possible with the machine running:
Step 0: No pendulum action
Step I: Small pendulum action
Step II: Medium pendulum action
Step III: Large pendulum action
Recommendations:
– The more narrow and clean the cutting edge
should be, the lower the pendulum action level
should be selected (or switched off).
– For thin materials, e. g. sheet metal, switch the
pendulum action off.
– For hard materials, e. g. steel, work with low
pendulum action.
– For soft materials and when sawing in the di-
rection of the grain, work with maximum pen-
dulum action.
The optimal setting can be determined by practi-
cal testing.
English - 3