Bosch GWS 22-180 JH Professional Originalbetriebsanleitung Seite 31

OBJ_BUCH-777-006.book Page 32 Monday, December 13, 2010 8:51 AM
32 | English
Rough Grinding
Never use a cutting disc for roughing.
The best roughing results are achieved when
setting the machine at an angle of 30° to 40°.
Move the machine back and forth with moderate
pressure. In this manner, the workpiece will not
become too hot, does not discolour and no
grooves are formed.
Flap Disc
With the flap disc (accessory), curved surfaces
and profiles can be worked.
Flap discs have a considerably higher service
life, lower noise levels and lower sanding tem-
peratures than conventional sanding sheets.
Cutting Metal
For cutting with bonded abrasives, always
use the protection guard for cutting 12.
When cutting, work with moderate feed, adapt-
ed to the material being cut. Do not exert pres-
sure onto the cutting disc, tilt or oscillate the
machine.
Do not reduce the speed of running down cut-
ting discs by applying sideward pressure.
1 609 929 X88 | (13.12.10)
Cutting Stone
Provide for sufficient dust extraction when
cutting stone.
Wear a dust respirator.
The machine may be used only for dry cut-
ting/grinding.
For cutting stone, it is best to use a diamond
cutting disc.
When using the cutting guide with dust extrac-
tion protection guard 23, the vacuum cleaner
must be approved for vacuuming masonry dust.
Suitable vacuum cleaners are available from
Bosch.
For cutting expecially hard material, e. g., con-
crete with high pebble content, the diamond
The machine must
cutting disc can overheat and become damaged
always work in an
as a result. This is clearly indicated by circular
up-grinding mo-
sparking, rotating with the diamond cutting
tion. Otherwise,
disc.
the danger exists
In this case, interrupt the cutting process and al-
of it being pushed
low the diamond cutting disc to cool by running
uncontrolled out
the machine for a short time at maximum speed
of the cut.
with no load.
When cutting pro-
Noticeable decreasing work progress and circu-
files and square
lar sparking are indications of a diamond cutting
bar, it is best to
disc that has become dull. Briefly cutting into
start at the small-
abrasive material (e. g. lime-sand brick) can re-
est cross section.
sharpen the disc again.
Information on Structures
Slots in structural walls are subject to the
Standard DIN 1053 Part 1, or country-specific
regulations.
These regulations are to be observed under all
circumstances. Before beginning work, consult
the responsible structural engineer, architect or
the construction supervisor.
Switch on the ma-
chine and place
the front part of
the cutting guide
on the workpiece.
Slide the machine
with moderate
feed, adapted to
the material to be
worked.
Bosch Power Tools