Bosch GST 85 P Professional Manual Original página 21

OBJ_BUCH-431-004.book Page 21 Friday, July 3, 2009 11:37 AM
Presetting the Stroke Rate (GST 85 PE)
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
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.
Contact Protector
The contact protector 10 attached to the casing
prevents accidental touching of the saw blade
during the working procedure and may not be
removed.
Plunge Cutting (see figure E)
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°.
Bosch Power Tools
Place the machine with the front edge of the
base plate 7 on to the workpiece without the
saw blade 9 touching the workpiece and switch
on. For machines with stroke rate control, select
the maximum stroke rate. Firmly hold the ma-
chine 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 work-
piece, continue sawing along the desired cutting
line.
Parallel Guide with Circle Cutter (Accessory)
For cuts using the parallel guide with circle cut-
ter 21 (accessory), the thickness of the material
must not exceed a maximum of 30 mm.
Parallel Cuts (see figure F): Loosen the locking
screw 20 and slide the scale of the parallel guide
through the lead 19 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 20.
Circular Cuts (see figure G): Set the locking
screw 20 to the other side of the parallel guide.
Slide the scale of the parallel guide through the
lead 19 in the base plate. Drill a hole in the work-
piece centred in the section to be sawn. Insert
the centring tip 22 through the inside opening of
the parallel guide and into the drilled hole. Set
the radius as the scale value on the inside edge
of the base plate. Tighten the locking screw 20.
Dismounting the Rotatable Top Handle
Before any work on the machine itself, pull
the mains plug.
For easier sawing in particularly tight locations,
the rotatable top handle 1 can be dismounted.
For this, press the orange pushbutton beyond
the latching point and pull off the rotatable top
handle upward at the same time.
Before assembling the rotatable top handle 1,
push up the orange pushbutton back into the
starting position again. Attach the rotatable top
handle 1 and press downward until it can be felt
to engage.
English | 21
1 609 929 S94 | (3.7.09)