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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 .
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) .
To remove paint and to smooth surface irregularities .
To smooth the rough sanding .
To remove scratches left by previous discs .
To smooth surfaces for painting, polishing or waxing .
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Operation
Operation: Refinishing painted wood or metal surfaces .
REMARKS
Fig. 25
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 .
Tip: Guide the disc with crisscross strokes . Do
not use a circular motion as this makes swirl
marks .
GRIT
Coarse 16-24-30
Medium 36-50-80
Fine 100-120
Very Fine 150-180
5/16/24 9:13 AM
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