On Wed, 12 Nov 2003 14:02:57 GMT, "Geoffrey W. Schultz"
wrote:

I have a KISS wind generator wind generator that develops vibration at
certain wind speeds. The problem is that there's a PVC fitting that goes
over a 2" stainless schedule 40 support pipe that is loose fitting. I want
to machine one with a sleeve bearing on a lathe and make it out of plastic.
However, I really don't have any experience machining plastic, I've been
looking at www.mscdirect.com under Raw Materials/Plastic Material/Rods for
3" material. To keep costs under control I'm looking at the following:

Nylon
Acetal
UHMW
LDPE
HDPE

Delryn, aka acetal, machines very nicely. Don't know how UV stable
it is. It (and nylon) will absorb moisture a little with
consequent slight dimensional change.

Another possibility might be Noryl.