Bosch Professional GCD 12 JL Original Instructions Manual page 22

OBJ_BUCH-1938-003.book Page 22 Friday, December 16, 2016 9:57 AM
22 | English
Marking the Cutting Line (see figure F)
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 19.
– 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 23). The laser
beam, as an example, can misadjust due to vibrations after in-
tensive use.
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.
Long workpieces must be underlaid or supported at their free
end.
– Place the workpiece against the angle stop 6.
– Slide the clamping spindle 7 against the workpiece and
firmly clamp the workpiece with the spindle handle 9.
Loosening the Workpiece
– Loosen the spindle handle 9.
– Tilt up the quick release 8 and pull the clamping spindle 7
away from the workpiece.
Working Advice
General Sawing Instructions
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.
Permissible Workpiece Dimensions
Maximum workpiece sizes:
Workpiece Form
100 x 100
158 x 80
110 x 110
1 609 92A 340 | (16.12.16)
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Minimum workpiece sizes
(= all workpieces that can be clamped via the clamping spin-
dle 7):
Length 80 mm
Cutting depth, max. (0°/0°): 115 mm
Dust- / Chip Disposal (see figure H)
Dust from materials such as lead-containing coatings, miner-
als and metal can be harmful to one's health. Contact with or
inhaling the dust can trigger allergic reactions to the operator
or bystanders and/or lead to respiratory infections.
Certain metal dust is considered hazardous, especially in con-
junction with alloys such as zinc, aluminium or chromium. Ma-
terials containing asbestos may only be worked by special-
ists.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the mate-
rials to be worked.
The saw blade 31 can become blocked by dust, chips or work-
piece fragments in the slot of the saw table 25.
– Switch the machine off and pull the mains plug from the
socket outlet.
– Wait until the saw blade has come to a complete stop.
– Pull out the chip drawer 24 and empty if completely.
 Prevent dust accumulation at the workplace. Dust can
easily ignite.
Starting Operation
 Observe the mains voltage! The voltage of the power
source must correspond with the data on the type plate of
the machine.
Position of the Operator (see figure I)
 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.
Mitre/Bevel Angle
– Do not cross your arms when operating the tool arm.
0° 45°
Switching On (see figure J)
115 Ø 90 Ø
To save energy, only switch the power tool on when using it.
– To start the machine, press the On/Off switch 17 and keep
it pressed.
Note: For safety reasons, the On/Off switch 17 cannot be
85 x 85
locked; it must remain pressed during the entire operation.
The tool arm can be guided down only after pushing the lock-
ing lever 1.
– For sawing, the locking lever 1 must be pushed in addition
85 x 85
to pressing the On/Off switch.
Soft starting
The electronic soft starting feature limits the torque upon
switching on and increases the working life of the motor.
85 x 85
Switching Off
– To switch off the machine, release the On/Off switch 17.
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