Bosch GCM 8 SJL Original Instructions Manual page 30

OBJ_BUCH-1736-003.book Page 30 Thursday, August 14, 2014 1:13 PM
30 | English
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 machine parts. Remove possibly
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.
Do not saw warped/bent workpieces. The workpiece must al-
ways have a straight edge to face against the fence.
Long workpieces must be underlaid or supported at their free
end.
Marking the Cutting Line (see figure M)
A laser beam indicates the cutting line of the saw blade. This
allows for exact positioning of the workpiece for sawing, with-
out having to open the retracting blade guard.
– For this, switch the laser beam on with the switch 39.
– Align the cutting mark on your workpiece with reference to
the right-hand edge of the laser line.
Note: Before sawing, check if the cutting line is still indicated
correctly (see "Adjusting the Laser", page 31). The laser
beam, as an example, can misadjust due to vibrations after in-
tensive use.
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 pro-
tects 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.
Permissible Workpiece Dimensions
Maximal workpiece sizes:
Mitre/Bevel Angle
Horizontal Vertical
0° 0°
45° (leftward/
rightward) 0°
0° 45°
45° (leftward) 45°
45° (rightward) 45°
Minimal workpiece sizes (= all workpieces that can be
clamped left or right from the saw blade with the supplied
material clamp 29): 100 x 40 mm (length x width)
Cutting depth, max. (0°/0°): 70 mm
Replacing Insert Plates (see figure O)
The red insert plates 18 can become worn after prolonged
use of the machine.
Replace defective insert plates.
– Bring the power tool into the working position.
– Unscrew the screws 49 with a hex key (size 4 mm) and
remove the old insert plates.
1 609 92A 0XG | (14.8.14)
– Insert the new right-hand insert plate.
– Screw the insert plate as far as possible to the right with
the screws 49 so that the saw blade does not come into
contact with the insert plate over the complete length of
the possible slide motion.
– Repeat the work steps in the same manner for the left-hand
insert plate.
Sawing
 Always tighten the locking knob 20 firmly before saw-
ing. Otherwise the saw blade can become wedged in the
workpiece.
Sawing without Slide Movement (Cutting Off)
(see figure P)
– For cuts without slide movement (small workpieces), loos-
en the locking screw 33 in case it is tightened. Slide the
tool arm to the stop in the direction of the fence 14 and
retighten the locking screw 33.
– Set the desired mitre angle.
– Firmly clamp the workpiece as appropriate for its dimen-
sions.
– Switch on the machine.
– Press locking switch 9 and slowly guide the tool arm down-
ward by the handle 8.
– Saw through the workpiece applying uniform feed.
– Switch off the machine and wait until the saw blade has
come to a complete stop.
– Guide the tool arm slowly upward.
Sawing with Slide Movement
– For cuts using the slide device 1 (wide workpieces), loosen
the locking screw 33 in case it is tightened.
– Set the desired mitre angle.
– Firmly clamp the workpiece as appropriate for its dimen-
sions.
– Pull the tool arm away from the fence 14 far enough so that
the saw blade is in front of the workpiece.
Height x Width
– Switch on the machine.
[mm]
– Press locking switch 9 and slowly guide the tool arm down-
70 x 312
ward by the handle 8.
– Press the tool arm in the direction of the fence 14 and saw
70 x 225
through the workpiece applying uniform feed.
– Switch off the machine and wait until the saw blade has
45 x 312
come to a complete stop.
45 x 225
– Guide the tool arm slowly upward.
45 x 225
Sawing Workpieces of the Same Length (see figure Q)
The material stop 36 (accessory) can be used for easily saw-
ing workpieces to the same length.
The material stop can be mounted on either side of the saw
table extension 13.
– Loosen lock screw 50 and swing the material stop 36 over
clamping screw 51.
– Retighten lock screw 50.
– Adjust the saw table extension 13 to the desired length
(see "Extending the Saw Table", page 28).
Bosch Power Tools