Working Advice - Bosch PST 900 PEL Manual Original

OBJ_BUCH-1053-001.book Page 27 Tuesday, September 29, 2009 8:16 AM
Controlling/Presetting the Stroke Rate
Increasing or reducing the pressure on the
On/Off switch 3 enables stepless stroke-rate
control of the switched-on machine.
When the On/Off switch 3 is locked on, the ma-
chine operates with the preset stroke rate.
With the thumbwheel for stroke rate preselec-
tion 2, 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

Before any work on the machine itself, pull
the mains plug.
When working small or thin workpieces, al-
ways use a stable support or a saw station
(Bosch PLS 300).
Plunge Cutting (see figure I)
Plunge cuts may only be applied to soft ma-
terials, such as wood, gypsum plaster
boards, etc.!
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 7 on to the workpiece without the saw
blade 19 touching the workpiece and switch on.
For machines with stroke rate control, 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 7 fully lays on the workpiece,
continue sawing along the desired cutting line.
Bosch Power Tools
Parallel Guide with Circle Cutter (Accessory)
For cuts using the parallel guide with circle cut-
ter 26 (accessory), the thickness of the material
must not exceed a maximum of 30 mm.
Remove the "Cut Control" base 13 from base
plate 7. For this, lightly press the base together
and remove it from the guide 23.
PST 1000 PEL: When using the sliding shoe 11,
the "Cut Control" viewing window 12 can be
clamped at the front of the sliding shoe. This
makes exact adjustment to the desired cutting
line, especially for bevel cuts, easier (see "Cut
Control for Bevel Cuts", page 26).
Parallel Cuts (see figure J): Loosen the locking
screw 27 and slide the scale of the parallel guide
through the lead 23 in the base plate. Set the
desired cutting width as the scale value on the
inside edge of the base plate. Tighten the lock-
ing screw 27.
Circular Cuts (see figure K): Drill a hole (large
enough to accomodate the saw blade) close to
the cutting line within the circle to be sawn.
Work the drill hole with a router or file to ensure
that the saw blade faces flush against the cut-
ting line. Reposition the locking screw 27 on the
other side of the parallel guide. Slide the scale
of the parallel guide throught the lead 23 in the
base plate. Drill a hole in the centre of the cut-
out to be sawn. Insert the centring tip 28
through the inside opening of the parallel guide
and into the drilled hole. Adjust the radius as
scale value at the inside edge of the base plate.
Tighten the locking screw 27.
Coolant/Lubricant
When sawing metal, coolant/lubricant should be
applied alongside cutting line because of the
material heating up.
2 609 003 953 | (29.9.09)
English | 27