Practical Advice - Bosch GCM 8 SDE Professional Manual Original

34 | English
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
The speed regulator (38) 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 Speed
1 3500 rpm
2 3800 rpm
3 4100 rpm
4 4400 rpm
5 4700 rpm
6 5300 rpm
Position of the operator (see figure M)
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 (1) (wide work-
pieces), loosen the locking screw (33) if it is clamping the
slide device in place.
– 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 (15) and until the
saw blade is in front of the workpiece.
– Switch on the power tool.
– Slowly guide the tool arm downwards using the
handle (9).
– Now push the tool arm towards the fences (15) and 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 N)
– To perform cuts without slide movement (small work-
pieces), loosen the locking screw (33) if it is clamping the
slide device (1) in place. Push the tool arm all the way to-
wards the fences (15) and and retighten the locking
screw (33) to lock the slide device in place.
1 609 92A 6SL | (16.07.2021)
– 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 (9).
– 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 O)
Material
A laser beam shows you the cutting line of the saw blade.
Aluminium
This allows for exact positioning of the workpiece for sawing,
without having to open the retracting blade guard.
– To activate this, turn on the laser beam using the
Plastics
switch (40).
– Align your mark on the workpiece with the right-hand
Wood
edge of the laser line.
Note: Before sawing, check whether the cutting line is still
indicated correctly. The laser beam can be misaligned due to
vibrations from intensive use, for example.
Permissible workpiece dimensions
Maximum workpiece dimensions:
Mitre angle
0°
45° (right/left)
0°
0°
45°
45°
45° (right/left)
Minimum workpiece dimensions (= all workpieces that can
be secured left or right of the saw blade using the supplied
screw clamps (28)): 100 x 40 mm (length x width)
Max. cutting depth (0°/0°): 70 mm
Adjusting the depth stop (sawing the groove) (see figure
P)
The depth stop needs to be adjusted if you wish to saw a
groove.
– Swivel the depth stop (32) outwards.
– Swivel the tool arm by the handle (9) into the required
position.
– Turn the adjusting screw (4) until the end of the screw
touches the depth stop (32).
– Slowly guide the tool arm upwards.
Sawing workpieces of the same length (see figure Q)
The length stop (36) (accessory) can be used for easily saw-
ing workpieces of the same length.
Bevel angle Height x width
[mm]
0° 70 x 312
0° 70 x 225
45° (left) 45 x 312
45° (right) 20 x 312
45° (left) 45 x 225
45° (right) 20 x 225
45° (left with SDS 30 x 225
bolt)
Bosch Power Tools