Bosch GWS18V-13C Instrucciones De Funcionamiento Y Seguridad página 21

Grinding Operations
SELECTING GRINDING WHEELS
maximum safe operating speed is not
exceeded by the nameplate speed of the
grinder. Do not exceed the recom mended
wheel diameter.
DISC 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 grinding wheels for fast grinding of
structural steel, heavy weld beads, steel
casting, stainless steel and other ferrous
metals.
Cutting Operations
METAL CUTTING
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
cutting of limited small stock such as metal
tubes, piping or rebar. When cutting, work
with moderate 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
surface, allowing the tool to operate at high
Operating Instructions
Before using a grinding
wheel, be certain that its
A Type 1 wheel guard
may not be included with
Efficient grinding is achieved by controlling
the pressure and keep ing the angle between
wheel and workpiece at 10° to 15°. If the
wheel is flat, the tool is difficult to control. If
the angle is too steep, the pressure is
concentrated on a small area causing burning
to the work surface.
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.
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. 14).
5. Remove the tool from the work surface
before turning the tool off. Allow the tool to
stop rotating before laying it down.
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GRINDING TIPS
Excessive or sudden
pressure on the wheel
FIG. 14