Preparing For Operation; Adjusting The Cutting Angle; Starting Operation - Bosch GCM Professional 80 SJ Manual Original

OBJ_BUCH-2154-004.book Page 25 Wednesday, June 14, 2017 5:06 PM
Operation
 Before any work on the machine itself, pull the mains
plug.
Transport Safety (see figure D)
The transport safety-lock 30 enables easier handling of the
machine when transporting to various working locations.
Releasing the Machine (Working Position)
– Push the tool arm by the handle 16 down a little in order to
relieve the transport safety-lock 30.
– Pull the transport safety-lock 30 completely outward.
– Guide the tool arm slowly upward.
Securing the Machine (Transport Position)
– Loosen the locking screw 11 if tightened. Pull the tool arm
completely to the front and tighten the locking screw
again.
– To lock the saw table 22, tighten the locking knob 25.
– Press locking switch 17 and slowly guide the tool arm
downward by the handle 16.
– Guide the tool arm downward until the transport safety-
lock 30 can be pushed completely inward.

Preparing for Operation

Moving the Fence (see figure E)
You have to move the adjustable fence 6 to saw bevel angles.
– Loosen the locking screw 40 using the supplied hex key
35.
The two outer fixing screws must not be loosened!
– Pull the adjustable fence 6 completely outward.
– Retighten the locking screw 40.
After sawing the bevel angles, slide the adjustable fence 6
back again (loosen the locking screw 40; slide the fence 6
completely inward; retighten the locking screw).
Extending the Saw Table (see figure F)
Long workpieces must be underlaid or supported at their free
end.
The saw table can be extended left and right with the saw-ta-
ble extensions 3.
– Loosen the clamping screw 2.
– Pull out the saw-table extension 3 to the desired length.
– Retighten the clamping screw 2 to fix the saw-table exten-
sion.
Clamping the Workpiece (see figure G)
To ensure optimum working safety, the workpiece must al-
ways be firmly clamped.
Do not saw workpieces that are too small to clamp.
– Press the workpiece firmly against the fences 6 and 21.
– Insert the material clamp 7 provided into one of the holes
41 intended for it.
– Adapt the threaded rod 42 of the screw clamp to the work-
piece height.
– Firmly tighten the threaded rod 42, thus fastening the
workpiece.
Bosch Power Tools

Adjusting the Cutting Angle

To ensure precise cuts, the basic adjustment of the machine
must be checked and adjusted as necessary after intensive
use (see "Checking and Adjusting the Basic Adjustment",
page 26).
 Always tighten the locking knob 25 firmly before saw-
ing. Otherwise the saw blade can become wedged in the
workpiece.
Adjusting Mitre Angles (see figure H)
The mitre angle can be set in the range from 47° (left side) to
47° (right side).
– Loosen the locking knob 25 in case it is tightened.
– Pull the lever 26 and turn the saw table 22 until the desired
mitre angle is indicated on the angle indicator 24.
– Tighten the locking knob 25 again.
For quick and precise setting of often used mitre angles,
detents 28 are provided on the saw table:
Left
0°
45° 22.5° 15°
– Loosen the locking knob 25 in case it is tightened.
– Pull lever 26 and rotate the saw table 22 left or right to the
requested detent.
– Release the lever again. The lever must be felt to engage in
the detent.
– Tighten the locking knob 25 again.
Adjusting Bevel Angles (see figure I)
The bevel angle can be set in the range from 0° to 45°.
– Pull the adjustable fence 6 completely outward.
– Loosen the lock lever 10.
– Tilt the tool arm by the handle 16 until the angle indicator
32 indicates the desired bevel angle.
– Hold the tool arm in this position and retighten the clamp-
ing lever 10.
For quick and precise setting of the standard angles 0°
and 45°, end stops are provided on the housing.
– Pull the adjustable fence 6 completely outward.
– Loosen the lock lever 10.
– To do so, swivel the tool arm by the handle 16 to the stop
34 to the right (0°) or to the stop 8 to the left (45°).
– Retighten the lock lever 10 again.

Starting Operation

 Observe correct mains voltage! The voltage of the pow-
er 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.
Products sold in AUS and NZ only: Use a residual current de-
vice (RCD) with a rated residual current of 30 mA or less.
Switching On (see figure J)
To save energy, only switch the power tool on when using it.
– To start the machine, press the On/Off switch 15 and keep
it pressed.
English | 25
Right
15° 22.5° 45°
1 609 92A 3BW | (14.6.17)