Starting Operation; Working Advice - Bosch GST 75 BE Professional Originalbetriebsanleitung

22 | English
Sawdust Blower Device
With the air jet of the sawdust blower device 8,
the cutting line can be kept free of dust and
chips.
Switching on the sawdust blow-
er device:
For cuts in materials with high
removal rate, such as in wood,
plastic, etc., push the switch 8
toward the vacuum connection.
Switching off the sawdust blow-
er device:
For cuts in metal and when a
dust extraction system is con-
nected, push the switch 8 to-
ward 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. Power tools marked with 230 V
can also be operated with 220 V.
Switching On and Off
To start the machine, press the On/Off switch 2
and keep it pressed.
To lock the pressed On/Off switch 2, push the
lock-on button 1 toward the right or left.
To switch off the machine, release the On/Off
switch 2. When the On/Off switch 2 is locked,
press it first and then release it.
Controlling/Presetting the Stroke Rate
Increasing or reducing the pressure on the
On/Off switch 2 enables stepless stroke-rate
control of the switched-on machine.
Light pressure on the On/Off switch 2 results in
a low stroke rate. Increasing the pressure also
increases the stroke rate.
When the On/Off switch 2 is locked, it is not
possible to reduce the stroke rate.
1 609 929 S79 | (17.3.09)
With the thumbwheel for stroke rate preselec-
tion 4, the stroke rate can be preset and
changed during operation.
1–2: Low stroke rate
3–4: Medium stroke rate
5–6: High 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 machine and allow the
machine to cool down by running it for approx.
3 minutes at maximum stroke rate.

Working Advice

When working small or thin work pieces, al-
ways use a sturdy support or a saw table
(accessory).
Check wood, press boards, building materials,
etc. for foreign objects such as nails, screws or
similar, and remove them, if required.
Plunge Cutting (see figure H)
The plunge cutting procedure is only suita-
ble for treating soft materials such as wood,
plaster board or similar! Do not work metal
materials with the plunge cutting proce-
dure!
Use only short saw blades for plunge cutting.
Plunge cutting is possible only with the mitre an-
gle set at 0°.
Place the machine with the front edge of the
base plate 6 on to the workpiece without the
saw blade 10 touching the workpiece and
switch on. For machines with stroke rate con-
trol, 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 6 fully lays on the work-
piece, continue sawing along the desired cutting
line.
Bosch Power Tools