Starting Operation; Working Advice - Bosch GST 12V-70 Professional Manual Original

18 | English
The optimum pendulum level for each application can be de-
termined by a practical test. Note the following recommend-
ations:
– Select a lower pendulum level or switch off the pendulum
action completely if you wish to produce a finer or cleaner
cutting edge.
– Switch off the pendulum action when machining thin ma-
terials (e.g. sheets).
– Work on hard materials (e.g. steel) with low pendulum ac-
tion.
– You can work on soft materials and saw wood using max-
imum pendulum action.
Adjusting the mitre/bevel angle (see figure H)
The base plate (9) can be swivelled to the right or left to
make mitre cuts up to 45°.
The extraction outlet (16) and anti-splinter guard (18) can-
not be used while mitre/bevel cuts are being made.
– Remove the extraction outlet (16) and the anti-splinter
guard (18).
– For mitre/bevel angle 0°, there is a pin in a corresponding
recess.
– Loosen the screw (23) with the hex key (24) until you can
slide the base plate (9) in towards the battery (1). Let the
pin slide into the guide groove.
– To adjust mitre/bevel angles, swivel the base plate (9) to
the required position according to the scale (25). Every
angle can be adjusted to 45° using a protractor.
– Retighten the screw (23).

Starting Operation

Inserting the battery
Note: The use of batteries unsuitable for your power tool can
lead to malfunctions or damage to the power tool.
Insert the charged battery (1) into the battery receptacle un-
til you feel it engage and it is securely locked in place.
Switching on the LED worklight
To switch the worklight (14) on or off, press the worklight
button (3).
Do not look directly into the worklight; it can blind
u
you.
Switching on/off
Make sure that you are able to press the On/Off switch
u
without releasing the handle.
To switch on the power tool, slide the on/off switch (7) for-
wards so that "I" appears on the switch.
To switch off the power tool, slide the on/off switch (7)
backwards so that "0" appears on the switch.
Restart protection
The restart protection feature prevents the power tool from
uncontrolled starting after the power supply to it has been
interrupted. Once the restart protection is active, the tem-
perature monitoring/overload protection indicator (6)
flashes continuously.
1 609 92A 6LB | (26.05.2021)
To restart the tool, set the on/off switch (7) to the off posi-
tion and then switch the power tool on again.
Note: Rapidly switching the power tool off and on again may
trigger the restart protection, meaning the power tool may
not start up even if the on/off switch (7) is pressed. Set the
on/off switch (7) to the off position and then switch the
power tool on again.
Preselect the stroke rate
You can also preselect the stroke rate and change it during
operation using the stroke rate preselection thumbwheel
(5).
The required stroke rate is dependent on the material and
the work conditions and can be determined using practical
tests.
It is recommended that you reduce the stroke rate when
placing the saw blade on the workpiece and when sawing
plastic and aluminium.
During prolonged periods of use at a low stroke rate, the
power tool may heat up significantly. Remove the saw blade
and let the power tool run at the maximum stroke rate for
around three minutes to cool down.
Temperature-dependent overload protection
In normal conditions of use, the power tool cannot be over-
loaded. If the power tool is overloaded or not kept within the
permitted battery temperature range, the speed is reduced
or the power tool switches off. At reduced speed, the power
tool will run again at full speed once the permitted battery
temperature is reached or the load is reduced. If it automat-
ically shuts down, switch the power tool off, allow the bat-
tery to cool down, then switch the power tool back on.
Temperature monitoring/overload protection indicator
The red temperature monitoring/overload protection
indicator (6) helps you to protect the battery against over-
heating and the motor against overload.
If the temperature monitoring/overload protection
indicator (6) is lit up permanently in red, the temperature
of the battery is too high and the power tool switches off
automatically.
Switch the power tool off and allow the battery to cool down
before you carry on working.
If the temperature monitoring/overload protection
indicator (6) is flashing red, then the power tool is blocked
and will switch off automatically.
Pull the power tool out of the workpiece. The power tool will
continue to work at the set stroke rate as soon as the block-
age is rectified.

Working Advice

Remove the battery from the power tool before carry-
u
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
Switch the power tool off immediately if the saw blade
u
becomes blocked.
Bosch Power Tools