Archie wrote:

What is the best kind of abrasive to use on aluminum?
Walnut shells or something else? They had glass beads
and aluminum oxide powder at HF.

Paul Lamar

Many types of media, as you know. Plastic,
 glass, flux, shells, talc, iron, etc
Glass is popular, because if you buy it in coarse numbers,
it continuously breaks down and exposes new
cutting surfaces.
Glass beads are popular for soft peening,
and are just that, Spheres.
Common glass for cleaning is merely ground
multi-faceted glass in various grits.

CAUTION: Glass has a way of imbedding itself
in aluminum and some softer metals,
and no matter how much you scrub it,
they will not release unless
heated in a soapy solution or similar.
Archie

 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org