Bosch GWX18V-10P Instrucciones De Funcionamiento Y Seguridad página 27

When cutting especially hard material, e. g.,
concrete with high pebble content, the dry
diamond wheel can overheat and become dam-
aged. This is clearly indicated by circular spark-
ing 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 cir-
cular 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. 23
Fig. 24
Fig. 25
Operating Instructions
Sanding
Sanding discs range in grit from 16 (very
course) to 180 (very fine). They also vary in size
and spacing of grit.
OPEN COAT (type H) is used for soft materials
and on paint and varnish, CLOSED COAT (type
K) is used for metal, hardwood, stone, marble
and other materials. To obtain best results, se-
lect sanding discs carefully. Many jobs require
the use of several grit sizes and at times both
open coat and closed coat discs are required
to complete the job. See chart for application
examples.
of the disc comes in contact with the work, a
violent thrust to the side may result.
Tip: Guide the disc with crisscross strokes. Do
not use a circular motion as this makes swirl
marks.
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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. Sanding rate is greatest when the
tool operates at high speed.
3. Maintain a 10° to 15° angle between the
tool and work surface, (Fig. 25).
If the disc (accessory) is
held flat or the back edge
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.
Operation: Refinishing painted wood or
metal surfaces.
REMARKS
To remove paint and to
smooth surface irregularities.
To smooth the rough sand-
ing.
To remove scratches left by
previous discs.
To smooth surfaces for paint-
ing, polishing or waxing.
GRIT
Coarse
16-24-30
Medium
36-50-80
Fine
100-120
Very Fine
150-180