-26-
Operating Instructions
▶ Masonry / Concrete Cutting
Never pull the tool
backward since blade
will climb out of the material and KICK-
BACK will occur.
With this grinder it is possible to perform
cutting of concrete and masonry materi-
als. When cutting, work with moderate
feed, adapted to the material being cut.
Always follow precautions for kickback.
Operate the tool with a dust extraction
system and personal dust protection, e.g.
respirator, dust mask, etc. The vacuum
used for this application must be ap-
proved for the extraction of masonry and
concrete dust. Bosch sells suitable vacu-
um cleaners.
1. Allow the tool to reach full speed be-
fore touching the tool to the work sur-
face.
2. If plunge cutting:
a. Tilt tool forward with wheel lined
up with the cut line and hold the
tool by the grinder body and the
auxiliary handle (Fig. 26).
b. Gradually lower the rear of tool us-
ing the front end of the foot as the
hinge point.
c. When the foot rests flat on the sur-
face being cut, proceed cutting in
forward direction to end of cut.
3. Always maintain contact between the
guard foot and work piece.
4. Slide the tool forward at a moderate
speed adapted to the material being
cut. Always cut towards the dust ex-
traction port to maximize dust extrac-
tion and reduce likelihood of kickback
(Fig. 27).
5. Apply minimum pressure to the work
surface, allowing the tool to operate
at high speed. Cutting rate is greatest
when the tool operates at high speed.
6. When the cut is completed, remove
tool from work piece before turning off.
Allow wheel to stop rotating before set-
ting tool down.
Tip: When performing deep cuts, it is best
to cut in several shallow passes. Each pass
should be only to the segment depth of
the wheel. Masonry dust is abrasive and
may wear and weaken the segment bond.
When cutting especially hard material, e.
g., concrete with high pebble content, the
dry diamond wheel can overheat and be-
come damaged. This is clearly indicated
by circular sparking of the rotating dry
diamond wheel. In this case, interrupt
the cutting process and allow the dry dia-
mond wheel to cool by running the tool
for a short period of time at the maximum
speed with no-load.
Noticeable decreasing work progress and
circular sparking are indications of a dry
diamond wheel that has become dull.
Briefly cutting into abrasive materials (e.
g. brick) can resharpen the wheel.
Fig. 26
Fig. 27
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