Bosch Professional GCM 12 Original Instructions Manual page 39

OBJ_BUCH-1040-001.book Page 39 Monday, January 18, 2010 12:35 PM
Adjusting with Help of the Fine Scale
With the fine scale 10, the horizontal mitre angle
can be set with an accuracy of up to ¼°.
Requested Fine scale
setting of the mark
initial angle X (scale 10)
X.25° ¼°
X.5° ½°
X.75° ¾°
Example: In order to adjust a 40.5° mitre angle,
the ½° mark of the fine scale 10 must be
brought into alignment with the 42° mark of
scale 9.
Adjusting Standard Vertical Bevel Angles
(see figure L)
For quick and precise adjustment of commonly
used bevel angles, stops are provided for 0°,
45° and 33.9° angles.
– Loosen the clamping lever 32.
– Standard angles 0° and 45°:
Tilt the tool arm by the handle 1 to the right
stop (0°) or to the left stop (45°).
– Retighten the clamping lever 32 again.
– Standard angle 33.9°:
Pull adjustment knob 31 completely outward
and turn it by 90°. Now tilt the tool arm via
the handle 1 until the tool arm can be heard
to engage.
Adjusting Any Vertical Bevel Angle
The vertical bevel angle can be set in the range
from 0° to 45°.
– Loosen the clamping lever 32.
– Tilt the tool arm by the handle 1 until the an-
gle indicator 47 indicates the desired bevel
angle.
– Hold the tool arm in this position and retight-
en the clamping lever 32.
Bosch Power Tools
Starting Operation
Switching On (see figure M)
– To start the machine, press the On/Off
... bring into
switch 2 and keep it pressed.
alignment with
Note: For safety reasons, the On/Off switch 2
the mark
cannot be locked; it must remain pressed during
(scale 9)
the entire operation.
X + 1°
The tool arm can only be guided downward
X + 2°
when pressing lever 3.
X + 3°
– For sawing, you must additionally press lever
3 in addition to actuating the On/Off switch.
Switching Off
– To switch off the machine, release the
On/Off switch 2.
Working Advice
General Sawing Instructions
For all cuts, it must first be ensured that the
saw blade at no time can come in contact
with the fence, screw clamps or other ma-
chine parts. Remove possibly mounted aux-
iliary stops or adjust them accordingly.
Protect the saw blade against impact and shock.
Do not subject the saw blade to lateral pressure.
Do not saw warped/bent workpieces. The work-
piece must always have a straight edge to face
against the fence.
Long workpieces must be underlaid or support-
ed at their free end.
Position of the Operator (see figure N)
Do not stand in a line with the saw blade in
front of the machine. Always stand aside of
the saw blade. This protects your body
against possible kickback.
– Keep hands, fingers and arms away from the
rotating saw blade.
– Do not cross your arms when operating the
tool arm.
English | 39
1 609 929 T11 | (18.1.10)