Bosch GWS10-450 Operating/Safety Instructions Manual page 21

b. Gradually lower the rear of tool using the
front end of the foot as the hinge point.
c. When the foot rests flat on the surface
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 extraction port to
maximize dust extraction and reduce
likelihood of kickback (Fig. 19).
FIG. 19
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 setting 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.
Operating Instructions
FIG. 18
-21-
When cutting especially hard material, e. g.,
concrete with high pebble content, the dry
diamond wheel can overheat and become
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 diamond 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.
CONCRETE SURFACING
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 approved for the
extraction of masonry and concrete dust.
Bosch sells suitable vacuum cleaners.
Diamond cup wheels should be carefully
selected in order to use the grinder most
efficiently. Wheels vary in type of material
they are designed to remove and how
aggressively they will remove material. The
correct wheel to use is determined by the
job.
1. Allow the tool to reach full speed before
touching the tool to the work surface.
2. Hold the tool with two hands and keep
diamond wheel flat on the work surface.
3. Apply minimum pressure, allowing the tool
to operate at high speed. Removal rate is
greatest when the tool operates at high
speed.
4. Continuously move the tool at a moderate
speed to avoid creating gouges in the work
surface.
5. Remove the tool from work surface before
turning tool off. Allow the tool to stop
rotating before laying it down.
Tip: For optimal dust collection, all sides of
the surfacing dust collection guard must stay
in contact with the surface and the surfacing
guard must be connected to a vacuum. A dull
diamond wheel can be sharpened by briefly
surfacing an abrasive material (eg. sand
stone).