Practical Advice - Bosch GCM 12 SDE Professional Manual Original

38 | English
ation has failed. The power tool must be sent to the after-
sales service without delay.
Sawing
General sawing instructions
Always tighten the locking knob (23) and the clamp-
u
ing lever (8) firmly before sawing. Otherwise the saw
blade can become wedged in the workpiece.
For all cuts, it must first be ensured that the saw blade
u
at no time can come in contact with the fence, screw
clamps or other machine parts. Remove any mounted
auxiliary stops or adjust them accordingly.
Protect the saw blade against impact and shock. Do not sub-
ject the saw blade to lateral pressure.
Only saw materials which are permitted within the scope of
the intended use.
Do not saw warped/bent workpieces. The workpiece must
always have a straight edge to face against the fence.
The free end of long and heavy workpieces must have some-
thing placed underneath it or be supported.
Make sure that the retracting blade guard operates properly
and that it can move freely. The retracting blade guard must
open when the tool arm is guided downwards. When the tool
arm is guided upwards, the retracting blade guard must
close again over the saw blade and lock in the uppermost po-
sition of the tool arm.
Adjusting the Speed (not available in all country-specific
versions)
The speed regulator (9) enables continuously variable ad-
justment of the speed of the power tool even during opera-
tion.
Note: Always set the suitable speed for the workpiece ma-
terial (see table below). This will prevent the saw teeth over-
heating when sawing.
Speed setting
1
2
3
4
5
6
Position of the operator (see figure L)
Do not stand in line with the saw blade in front of the
u
power tool. Always stand to the side of the saw blade.
This protects your body against possible kickback.
– Keep hands, fingers and arms away from the rotating saw
blade.
– Do not reach one hand across the other when in front of
the tool arm.
Sawing with slide movement
– For cuts made using the slide device (37) (wide work-
pieces), loosen the locking screw (6) if it is clamping the
slide device in place.
1 609 92A 6SN | (12.07.2021)
– Firmly clamp the workpiece as appropriate for its dimen-
sions.
– Set the required mitre and/or bevel angle.
– Pull the tool arm away from the fences (2) and (1) until
the saw blade is in front of the workpiece.
– Switch on the power tool.
– Slowly guide the tool arm downwards using the
handle (13).
– Now push the tool arm towards the fences (2) and (1)
and saw through the workpiece with uniform feed.
– Switch off the power tool and wait until the saw blade has
come to a complete stop.
– Slowly guide the tool arm upwards.
Sawing Without Slide Movement (cutting off) (see
figure M)
– To perform cuts without slide movement (small work-
pieces), loosen the locking screw (6) if it is clamping the
slide device (37) in place. Push the tool arm all the way
towards the fences (2) and (1) and retighten the locking
screw (6) to lock the slide device in place.
– Firmly clamp the workpiece as appropriate for its dimen-
sions.
– Set the required mitre and/or bevel angle.
– Switch on the power tool.
– Slowly guide the tool arm downwards using the
handle (13).
– Saw through the workpiece applying uniform feed.
– Switch off the power tool and wait until the saw blade has
come to a complete stop.
– Slowly guide the tool arm upwards.

Practical advice

Marking the cutting line (see figure N)
Two laser beams indicate the cutting width of the saw blade.
Material
This allows for exact positioning of the workpiece for sawing,
Aluminium
without having to open the retracting blade guard.
– Switch on the laser beams with the switch (34).
Plastics
– Position your mark on the workpiece between the two
laser lines.
Note: Before sawing, check if the cutting width is still indic-
Wood
ated correctly Adjusting the Laser. Vibrations during intens-
ive use, for example, can cause the laser beams to become
misaligned.
Permissible workpiece dimensions
Mitre angle Bevel angle
0° 0°
45° 0°
0° 45° (left)
Height x width
[mm]
85 x 370
A)
70 x 400
A)
120 x 200
B)
175 x 60
85 x 250
B)
175 x 20
60 x 360
Bosch Power Tools