Operating Modes; Starting Operation; Switching On/Off - Bosch GST 90 BE Professional Notice Originale

Switch off the sawdust blower device when you have con-
nected the dust extraction system.
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
Products that are only sold in AUS and NZ: Use a resid-
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ual current device (RCD) with a nominal residual current
of 30 mA or less.

Operating modes

Pull the plug out of the socket before carrying out any
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work on the power tool.
Pendulum action settings
The pendulum action can be adjusted using four 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 (7).
Level 0 No pendulum action
Level I Low pendulum action
Level II Moderate pendulum action
Level III 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 in the direc-
tion of the grain using maximum pendulum action.
Adjusting the mitre/bevel angle (see figure G)
The base plate (5) can be swivelled to the right or left to
make mitre cuts up to 45°.
The hood (15), the extraction outlet (16) and the anti-
splinter guard (14) cannot be used while mitre/bevel cuts
are being made.
– Push the extraction outlet (16) downwards slightly and
pull it out of the base plate (5).
– Remove the hood (15) and the anti-splinter guard (14).
– Undo the screw (19) using the hex key (4) and push the
base plate (5) slightly towards the mains cable.
– The base plate has lock-in points at 0° and 45° on the left
and right so that precise mitre/bevel angles can be set.
Swivel the base plate (5) to the required position accord-
Bosch Power Tools
ing to the scale (18). Other mitre/bevel angles can be ad-
justed using a protractor.
– Then push the base plate (5) towards the saw blade (10)
as far as it will go.
– Retighten the screw (19).
Moving the base plate (see figure G)
You can move the base plate (5) back for sawing close to
edges.
Loosen the screw (19) and push the base plate (5) towards
the mains cable as far as it will go.
Retighten the screw (19).
Sawing with an offset base plate (5) is only possible with a
mitre/bevel angle of 0°. In addition, the parallel guide with
circle cutter (22) (accessory) as well as the anti-splinter
guard (14) must not be used.
Sawdust blower device
The cutting line can be kept clear of chips using the airflow
from the sawdust blower device.
To switch on the sawdust blower device:
When working with high material removal in
wood, plastic and other similar materials,
push the switch (6) towards the extraction
outlet.
To switch off the sawdust blower device:
When working in metal and with a dust extrac-
tion system connected, push the switch (6)
towards the saw blade.

Starting Operation

Pay attention to the mains voltage. The voltage of the
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power source must match the voltage specified on the
rating plate of the power tool. Power tools marked
with 230 V can also be operated with 220 V.

Switching on/off

Make sure that you are able to press the On/Off switch
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without releasing the handle.
To switch on the power tool, press the on/off switch (2).
To lock the on/off switch (2), keep it pressed down and
push the locking mechanism (1) to the right or left.
To switch off the power tool, release the on/off switch (2).
If the on/off switch (2) is locked, press the switch first and
then release it.
Controlling/preselecting the stroke rate
You can variably adjust the stroke rate of the power tool
when it is on by pressing in the on/off switch (2) to varying
extents.
Applying light pressure to the on/off switch (2) results in a
low stroke rate. Applying increasing pressure to the switch
increases the stroke rate.
It is not possible to reduce the stroke rate while the on/off
switch (2) is locked.
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