Quote:
Greaseless Compound
Produces a semi-dull/bright appearance commonly referred to
as satin, silk, butler or scratch finish. Use for burring, polishing,
trimming, blending, breaking edges and removing machine marks, pits and surface imperfec-
tions. Excellent for cleaning rusty surfaces and welding burns. The descriptive word “grease-
less” is applied to this type of polishing compound because it is made completely free of grease,
oil or wax. The formulations are composed of abrasive grits blended into a mixture of animal
hide glue and water, which serves as the adhesive binder. When the solid stick compound is ap-
plied to a revolving buffing wheel, frictional heat softens the compound - transferring a coating
to the wheel face. The coating dries immediately, forming a flexible and resilient abrasive cut-
ting surface that is ready for instant use. When the abrasive head is worn down, polishing action
is renewed by again applying compound over the worn head. The work surface is left dry - re-
quiring no cleaning should a subsequent painting or plating operation follow.
Greaseless Buffing compounds may be applied to almost any cloth buffing wheel, (sisal, spiral
sewn cotton & loose cotton) turning it into a tough flexible grinding wheel. The roughest casting
edges can quickly removed. These materials do an excellent job of leveling highly contoured
surfaces quickly.
Currently, Greaseless Compounds come in 5 grit sizes: 80, 120, 180, 240, 400.
Ideal for removing sand casting marks from manifold, wheels, etc.
For storage, the compound should be sealed in its plastic sleeve, or in a Ziplock bag, and stored
in a cool location. If the compound has hardened, place 1/4 cup of water with it in the bag, and
leave it for 24-48 hours to re-absorb the water.
And regarding wheel size and rpm Caswell sez:
Quote:
BUFF RUNNING SPEEDS
For best results your wheel should maintain a surface speed of between 3600 & 7500 Surface
Feet Per Minute. (SFPM). The higher your speed, the better and quicker your results.
Formula for calculating surface speed of wheel
in SFPM.
SFPM = 1/4 x diameter of Wheel x RPM (revs of
spindle per min.)
Therefore an 8” wheel @ 3600 RPM =2 x 3600 =
7200SFPM.
Spindle speeds can be increased by a step pulley on a motor shaft.
Hopefully this will help in clearing up some questions about buffing... The PDF was posted in another thread, but I can't seem to find it at the moment.