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Bosch GST 12V-70 Professional Manual

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18 | English
Certain dusts, such as oak or beech dust, are classified as
carcinogenic, especially in conjunction with wood treatment
additives (chromate, wood preservative). Materials contain-
ing asbestos may only be machined by specialists.
– Use a dust extraction system that is suitable for the ma-
terial wherever possible.
– Provide good ventilation at the workplace.
– It is advisable to wear a P2 filter class breathing mask.
The regulations on the material being machined that apply in
the country of use must be observed.
uAvoid dust accumulation at the workplace. Dust can
easily ignite.
Hood
Fit the hood (15) before you connect the power tool to the
dust extraction system.
Attach the hood(15) to the power tool so that the bracket
locks into place on the shock protection guard(21).
Remove the hood(15) when working without a dust extrac-
tion system and for mitre/bevel cuts. To do this, pull the
hood forwards off the shock protection guard(21).
Connecting the dust extraction (see figures F–G)
Fit the extraction outlet(16) in the recesses of the base
plate(9).
Connect a dust extraction hose (22) (accessory) to the ex-
traction outlet (16). Connect the dust extraction hose (22)
to a dust extractor (accessory).
You will find an overview of connecting to various dust ex-
tractors at the end of these operating instructions.
For optimum dust extraction, where possible use the anti-
splinter guard (18).
The dust extractor must be suitable for the material being
worked.
When extracting dry dust that is especially detrimental to
health or carcinogenic, use a special dust extractor.
Operation
Operating modes
uRemove the battery from the power tool before carry-
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.
Pendulum action settings
The pendulum action can be adjusted using three different
settings, allowing the cutting speed, cutting capacity and the
cut itself to be optimally adapted to the material that you
want to cut.
You can also adjust the pendulum action during operation
using the adjusting lever (8).
Level0 No pendulum action
LevelLow pendulum action
LevelHigh pendulum action
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).
uDo not look directly into the worklight; it can blind
you.
Switching on/off
uMake sure that you are able to press the On/Off switch
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 85Y | (15.07.2022) Bosch Power Tools
… 18 …


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