Clamping The Workpiece (See Figure E); Starting Operation; Working Advice - Bosch GCO 20-14 Professional Manual Original

OBJ_BUCH-1063-006.book Page 18 Tuesday, September 6, 2016 3:45 PM
18 | English
Adjusting the Cutting Angle (see figure D)
The mitre angle can be set in a range from 0° to 45°.
Frequently used mitre angles are identified on the angle stop
7 with appropriate markings. The 0° and 45° position are set
at the respective end stop.
– Loosen the locking screws 14 for the angle stop using the
hex key provided 12 (8 mm).
– Adjust the desired angle and firmly tighten both locking
screws 14 again.
Displacing the Angle Stop (see figure D and E)
You can displace the angle stop 7 backward.
– Completely unscrew the locking screws 14 using the hex
key provided 12 (8 mm).
– Move the angle stop 7 toward the rear by one or two holes
to the desired clearance.
– Adjust the desired angle and firmly tighten both locking
screws 14 again.

Clamping the Workpiece (see figure E)

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 7.
– Slide the clamping spindle 8 against the workpiece and
firmly clamp the workpiece with the spindle handle 10.
Loosening the Workpiece
– Loosen the spindle handle 10.
– Tilt up the quick release 9 and pull the clamping spindle 8
away from the workpiece.

Starting Operation

 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
 Check the cutting disc before using. The cutting disc
must be properly mounted and must rotate freely. Car-
ry out a 30 second (min.) test run with no load. Do not
use damaged, out-of-centre or vibrating cutting discs.
Damaged cutting discs can burst and cause injuries.
Dust from materials such as lead-containing coatings, miner-
als and metal can be harmful to one's health. Contact with or
inhaling the dustcan 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 blade can be blocked by dust, chips or workpiece frag-
ments in the slot of the base plate 13.
1 609 92A 34D | (6.9.16)
– Switch the machine off and pull the mains plug from the
socket outlet.
– Wait until the cutting disc has come to a complete stop.
– Tilt the machine toward the rear, so that small workpiece
fragments can fall out of the opening intended for this pur-
pose.
If required, use a suitable tool to remove all workpiece frag-
ments.
 Prevent dust accumulation at the workplace. Dust can
easily ignite.
Position of the Operator (see figure F)
 Do not stand in a line with the cutting disc in front of the
machine. Always stand aside of the cutting disc. This
measure provides for better protection of your body
against possible splinters in case of cutting disc breakage.
Switching On and Off (see figure G)
To save energy, only switch the power tool on when using it.
– To start the machine, firstly press the lock-off button 1.
Then press the On/Off switch 2 and keep it pressed.
Note: For safety reasons, the On/Off switch 2 cannot be
locked; it must remain pressed during the entire operation.
– To switch off the machine, release the On/Off switch 2.

Working Advice

General Cutting Instructions
 Do not touch the cutting disc after working before it
has cooled. The cutting disc becomes very hot while work-
ing.
 Make sure that the spark guard 19 is properly mount-
ed. Sparking occurs when cutting metal.
Protect the cutting disc against impact, shock and grease. Do
not subject the cutting disc to lateral pressure.
Do not strain the power tool so heavily that it comes to a
standstill.
Excessive feed considerably reduces the performance capa-
bility of the machine and shortens the service life of the cut-
ting disc.
Use only cutting discs that are suitable for the material to be
worked.
Permissible Workpiece Dimensions
Maximum workpiece sizes:
Workpiece Form
119 x 119
Mitre/Bevel Angle
0° 45°
129 Ø 128 Ø
110 x 110
Bosch Power Tools