Bosch GWS18V-13C Instrucciones De Funcionamiento Y Seguridad página 23

Grinding
SELECTING GRINDING WHEELS
Before
wheel, be certain that its
maximum safe operating speed is not exceed-
ed by the nameplate speed of the grinder. Do
not exceed the recom mended wheel diameter.
GRINDING WHEELS
Grinding wheels should be carefully selected in
order to use the grinder most efficiently. Wheels
vary in type of abrasive, bond, hardness, grit
size and structure. The correct type of wheel
to use is determined by the job. Use disc grind-
ing wheels for fast grinding of structural steel,
heavy weld beads, steel casting, stainless steel
and other ferrous metals.
1. Allow the tool to reach full speed before
touching the tool to the work surface.
2. Apply minimum pressure to the work sur-
face, allowing the tool to operate at high
speed. Grinding rate is greatest when the
tool operates at high speed.
3. Maintain a 10° to 15° angle between the tool
and work surface, (Fig. 16).
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 rotat-
ing before laying it down.
Fig. 16
Excessive or sudden pres-
sure on the wheel will slow
grinding action and put dangerous stresses on
the wheel.
When grinding with a new wheel be certain to
grind while pulling tool backwards until wheel
becomes rounded on its edge. New wheels have
sharp corners which tend to "bite" or cut into
work piece when pushing forward.
160992A7PL GWS18V-13CP 202206.indd 23
Operating Instructions
using a grinding
-23-
Cutting
METAL CUTTING
A Type 1A/41 wheel guard
may not be included with
this tool but is required when using a cutting
wheel. Cutting with a type 27 wheel guard may
not provide the operator sufficient protection in
the event of a wheel burst.
With this grinder it is possible to perform cut-
ting of limited small stock such as metal tubes,
piping or rebar. When cutting, work with mod-
erate feed, adapted to the material being cut.
When cutting profiles and square bar, it is best
to start at the smallest cross section.
Always follow precautions for kickback.
1. Allow the tool to reach full speed before
touching the tool to the work surface.
2. The tool should always be used in such way
that the sparks are directed away from user.
3. Apply minimum pressure to the work sur-
face, allowing the tool to operate at high
speed. Cutting rate is greatest when the tool
operates at high speed.
4. Do not exert side pressure onto the cutting
disc. Do not tilt or oscillate the tool as wheel
may burst, (Fig. 17).
5. Remove the tool from the work surface be-
fore turning the tool off. Allow the tool to
stop rotating before laying it down.
Fig. 17
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