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SANDING, BUFFING AND POLISHING
USING
THE LATHE
TO SAND
TURNINGS
•
Turnings
should
be sanded
with the lathe running
in sec-
ond lowest
speed.
•
A large sheet of sandpaper
is useful for smoothing
cylinders.
•
All other sanding
operations
are done with a narrow
strip
of abrasive
paper. The best finishing
grit is 3/0 for soft-
wood, 4/0 for hardwoods.
Worn 2/0 paper
is often
used,
and is the equivalent
of 3/0 or 4/0 new paper.
Figure 75
The application
of the sandpaper
strip is shown
in the illustrations.
Care must
be exercised
in order
to prevent
dubbing
the
corners
of beads,
shoulders,
etc.
Figure 76
Coves
Wood
Fibers
@
Sandpaper
Fibers
lifted
and
Cut Off
USE OF SANDING
DRUMS
Refer to Figure
77.
Standard
sanding
drums
are usually
rubber
cylinders
which
can be expanded
to hold an abrasive
sleeve
in place. Similar
cylinders,
turned
on the lathe and covered
with abrasive
paper, will be adequate
for the job. These
have the advantage
that special
sizes,
tapers,
etc. can be made. Adhesive
papers
must be glued to the cylindrical
surface
precisely
and com-
pletely.
Figure 77
The drum is used mainly
for sanding
the edges
of curved
work.
•
The squareness
of the edge of the work can be best
retained
by using a simple
form of vertical
fence as shown.
•
The standard
sanding
drums
are commonly
made with a
threaded
hole to fit the lathe drive
spindle.
•
To guard against
loosening
of the taper shank while the
drum is in operation,
it is advisable
to support
the free end,
using either a ballbearing
or plain 60 ° center
in the tail stock.
USE OF WOOD
CHUCKS
FOR SANDING
Quick-acting
chucks
can be very useful for sanding
operations
on duplicate
production
parts. The chuck
is made
slightly
oversized,
and a piece of rubber
hose (for small
parts)
is
inserted
in the recess
to grip the workpieces.
Figure 78
WARNING:
Make certain
that the unit is disconnected
from
power
source
before attempting
to service
or remove
any
component.
CLEANING
Keep machine
and workshop
clean.
Do not allow sawdust
to
accumulate
on the tool. Keep centers
clean.
Be certain
motor
is kept clean and is frequently
vacuumed
free of dust.
Use soap and water
to clean
painted
parts,
rubber
parts
and
plastic
guards.
LUBRICATION
The shielded ball bearings in this tool are permanently
lubri-
cated at the factory. They require no further lubrication.
KEEP
TOOL
IN REPAIR
•
If power cord
is worn,
cut, or damaged
in any way, have it
replaced
immediately.
•
Replace
any damaged
or missing
parts.
Use parts
list to
order
parts.
Any attempt
to repair
motor may create
a hazard
unless
repair
is done
by a qualified
service
technician.
Repair
service
is available
at your nearest
Sears
store.
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