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the angle is too steep, the pressure isWhen grinding with a new wheel be certain
concentrated on a small area causingto grind while pulling tool backwards until
burning to the work surface.wheel becomes rounded on its edge. New
Excessive or sudden pres-wheels have sharp corners which tend to
!WARNING
sure on the wheel will slowObite� or cut into workpiece when pushing
grinding action and put dangerous stressesforward.
on the wheel.
Sanding Operations
SELECTING SANDING DISCjobs require the use of several grit sizes and
Sanding discs are made of extremely hardat times both Oopen coat and closed coat�
and sharp aluminum oxide grits, phenol-discs are required to get the job done faster.
resin bonded to a sturdy fiber backing forSee chart for application examples.
fast heavy-duty service and long life. The
Operation: Refinishing painted wood or metal surfaces.
discs vary as to size and spacing of theREMARKSGRIT
abrasive grits. OPEN COAT (type H) N usedTo remove paint and to smoothCoarse
for soft materials and on paint or varnish.surface irregularities. 16-24-30
CLOSED COAT (type K) Nused for metal,To smoothMedium
hardwood, stone, marble and otherthe rough sanding. 36-50-80
materials.To remove scratches left by Fine
previous discs. 100-120
Sanding discs range in grit from 16 (very
To smooth surfaces for painting, Very Fine
coarse) to 180 (very fine). To obtain best
polishing or waxing. 150-180
results, select sanding discs carefully. Many
SANDING TIPSappear, then stop and change to a Oclosed
For best results, tilt the Disc Sander at a 10!coat� disc to remove any remaining paint.
to 15! angle while sanding so that only about
SANDING WOOD
1" of the surface around the edge of the disc
When sanding wood the direction of the disc
contacts the work.
motion at the contact point should parallel
If the disc (accessory) isthe grain as much as possible. The rapid cut
!WARNING
held flat or the back edge ofof discs and the swirl type scratch pattern
the disc comes in contact with the work, athey occasionally create generally prohibit
violent thrust to the side may result.their use for producing the final finish.
If sander is tilted too much, sanding actionScratches and circular marks are usually the
will be too great and a rough cut surface orresult of using too coarse a grit. When
gouging and snagging will result.changing to a finer grit, move across the
sanding lines that were made by a previous
Guide the Disc Sander with crosswise
coarser disc.
strokes. Be careful not to hold the sander in
one spot too long. Do not use a circularSANDING METAL
motion, as this makes swirl marks. TestWhen sanding automobiles or appliances,
before use on scrap stock.wipe the metal clean with a non-flammable
Do not force or apply pressure whensolvent or commercial cleaner to remove all
sanding. Use only the weight of the tool forwax and grease. By doing this first, the
pressure. Excess pressure actually slows thesanding discs will sand better and last
tool down. If faster stock removal is desired,longer.
change to a coarser grit disc.For heavy duty work, use a coarse grit disc
Remove gummy paint from metal with anfirst. Follow-up with a medium grit to remove
Oopen coat� disc. Sand until sparks start to scratches. To produce smooth finish, use
fine grit disc.
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ACEC
