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The vacuum cleaner must be approved for the extrac-
tion of masonry dust. Bosch provides suitable vacuum
cleaners.
Note: When not using for extended periods, pull the
mains plug out of the socket outlet. When the mains
plug is inserted and mains voltage is given, the power
tool, even when switched off, still consumes a low
amount of current.
Rough Grinding
f Never use a cutting disc for roughing.
Switch
on
the
machine and place
the front part of the
cutting guide on the
workpiece. Slide the
machine with moder-
ate feed, adapted to
the material to be
worked.
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 temperatures
than conventional sanding sheets.
Cutting Metal
For cutting expecially hard material, e. g., concrete
with high pebble content, the diamond cutting disc
can overheat and become damaged as a result. This
is clearly indicated by circular sparking, rotating with
the diamond cutting disc.
In this case, interrupt the cutting process and allow
the diamond cutting disc to cool by running the
machine for a short time at maximum speed with no
load.
f For cutting metal, always work with the pro-
tection guard for cutting 12.
When cutting, work with moderate feed, adapted to
the material being cut. Do not exert pressure onto the
cutting disc, tilt or oscillate the machine.
Noticeable decreasing work progress and circular
sparking are indications of a diamond cutting disc that
has become dull. Briefly cutting into abrasive material
(e. g. lime-sand brick) can resharpen the disc again.
Do not reduce the speed of running down cutting
discs by applying sideward pressure.
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 cir-
cumstances. Before beginning work, consult the
responsible structural engineer, architect or the con-
struction supervisor.
The
machine must
always work in an up-
grinding motion. Oth-
erwise, the danger
exists
of
it
being
pushed
uncon-
trolled out of the cut.
Maintenance and Service
When cutting profiles
and square bar, it is
best to start at the
smallest cross sec-
tion.
Maintenance and Cleaning
Cutting Stone
f Before any work on the machine itself, pull
the mains plug.
f For cutting stone, always work with the cut-
ting guide with dust extraction protection
guard 19.
f For safe and proper working, always keep
the machine and ventilation slots clean.
f The machine may be used only for dry cut-
ting/grinding.
For cutting stone, it is best to use a diamond cutting
disc. As a safety measure against jamming, the cutting
guide with dust extraction protection guard 19 must
be used.
Operate the machine only with dust extraction and
additionally wear a dust protection mask.
f In extreme working conditions, conductive
dust can accumulate in the interior of the
machine when working with metal. The pro-
tective insulation of the machine can be
degraded. The use of a stationary extraction
system is recommended in such cases as
well as frequently blowing out the ventila-
tion slots and installing a residual current
device (RCD).
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1 609 929 K94 • 20.12.06