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If the power tool has been subjected to a
u
heavy load, continue to run it at no-load for
several minutes to cool down the accessory.
Do not use the power tool with a cut-off
u
stand.
Do not touch grinding and cutting discs until
u
they have cooled down. The discs can be-
come very hot while working.
Rough grinding
English
Never use cutting discs for rough grinding.
u
The best rough grinding results are achieved with
a set angle of 30° to 40°. Move the power tool
back and forth with moderate pressure. This will
ensure that the workpiece does not become too
hot or discolour and that grooves are not formed.
Flap Disc
English
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 conven-
tional sanding sheets.
Cutting Metal
English
Always use the protective guard for cutting
u
(9) when cutting bonded abrasives.
When carrying out abrasive cutting, use a moder-
ate feed that is suited to the material being ma-
chined. Do not exert pressure on the cutting disc
and do not tilt or swing the power tool.
Do not attempt to reduce the speed of a cutting
disc coming to a stop by applying pressure from
the side.
Cutting stone
English
Provide sufficient dust extraction when cut-
u
ting stone.
Wear a dust mask.
u
The power tool may be used only for dry cut-
u
ting/grinding.
For best results when cutting stone, use a dia-
mond cutting disc.
When using the extraction guard for cutting with a
cutting guide (18), the vacuum cleaner must be
approved for vacuuming stone dust. Suitable va-
cuum cleaners are available from BTI.
46 | English
The power tool must
always work in an up-
grinding motion. Other-
wise, there is a risk
that it will be pushed
uncontrolled out of
the cut. For best res-
ults when cutting pro-
files and rectangular
tubing, start at the
smallest cross section.
cially hard materials such as concrete with a 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.
If this happens, stop cutting and allow the dia-
mond cutting disc to cool down by running the
power tool for a short time at maximum speed
with no load.
If work is noticeably slower and with circular
sparking, this indicates that the diamond cutting
disc has become dull. You can resharpen the disc
by briefly cutting into abrasive material (e.g. lime-
sand brick).
Information on structural design
Slots in load-bearing walls are subject to DIN
1053 part 1 or country-specific regulations. These
regulations must be observed under all circum-
stances. Seek advice from the responsible struc-
tural engineer, architect or construction super-
visor before starting work.
Maintenance and Service
Maintenance and cleaning
Pull the plug out of the socket before carry-
u
ing out any work on the power tool.
To ensure safe and efficient operation, al-
u
ways keep the power tool and the ventilation
slots clean.
In extreme conditions, always use a dust ex-
u
tractor if possible. Blow out ventilation slots
frequently and install a residual current
device (RCD) upstream. When machining
metals, conductive dust can settle inside the
power tool, which can affect its protective insu-
lation.
Store and handle the accessories carefully.
In order to avoid safety hazards, if the power sup-
ply cord needs to be replaced, this must be done
by BTI or by an after-sales service centre that is
authorised to repair BTI power tools.
Switch on the power
tool and position it with
the front part of the
cutting guide on the
workpiece. Move the
power tool with a mod-
erate feed motion that
is suited to the material
being machined.
When cutting espe-
English
English
English
1 609 92A 4ZW • 5.4.19
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