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Sanding Operations
SELECTING SANDING DISC
Sanding discs are made of extremely hard
and sharp aluminum oxide grits, phenol-
resin bonded to a sturdy fiber backing for
fast heavy-duty service and long life. The
discs vary as to size and spacing of the
abrasive grits. OPEN COAT (type H) — used
for soft materials and on paint or varnish.
CLOSED COAT (type K) —used for metal,
h a r d w o o d , s t o n e , m a r b l e a n d o t h e r
materials.
Sanding discs range in grit from 16 (very
coarse) to 180 (very fine). To obtain best
results, select 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 get the job done
faster. See chart for application examples.
Sanding Tips
For best results, tilt the Disc Sander at a
10° to 15° angle while sanding so that only
about 1" of the surface around the edge of
the disc contacts the work.
If the disc (accessory) is
held flat or the back edge
of the disc comes in contact with the work,
a violent thrust to the side may result.
If sander is tilted too much, sanding action
will be too great and a rough cut surface or
gouging and snagging will result.
G u i d e t h e D i s c S a n d e r w i t h c r o s s w i s e
strokes. Be careful not to hold the sander in
one spot too long. Do not use a circular
motion, as this makes swirl marks. Test
before use on scrap stock.
D o n o t f o r c e o r a p p l y p r e s s u r e w h e n
sanding. Use only the weight of the tool for
pressure. Excess pressure actually slows
the tool down. If faster stock removal is
desired, change to a coarser grit disc.
Remove gummy paint from metal with an
“open coat” disc. Sand until sparks start to
appear, then stop and change to a “closed
coat” disc to remove any remaining paint.
Operation:
Refinishing painted wood or metal surfaces.
REMARKS
gRIT
To remove paint and to smooth
surface irregularities.
Coarse
16-24-30
To smooth the rough sanding.
Medium
36-50-80
To remove scratches left by previous
discs.
Fine
100-120
To smooth surfaces for painting,
polishing or waxing.
Very Fine
150-180
Operating Instructions
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 (e.g. sand
stone).
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