On Sun, 31 Jul 2011 20:00:56 -0700, Gunner Asch
wrote:

On Mon, 01 Aug 2011 02:20:10 +0000, Christopher Tidy
wrote:

Gunner Asch wrote:

If its not dynamically loaded..should work fine. If its loaded...it wont
last as long as other better Stuff will.

Thanks for the thoughts. It's a piston in a miniature air pump. Here's a
picture. The plastic layer is over the knurling you can see:
http://www.mythic-beasts.com/~cdt22/pump_piston.jpg

I had wondered about oil-filled nylon. It's definitely not epoxy as I've
been told it was thermally moulded.

Chris


That piston shouldnt be loaded so it should work for quite a while.
Nylon makes poor rollers for heavy stuff, but not bad for that sort of
thing

Gunner
The only issue I can see with Nylon in that application is Nylon is
Hygroscopic - it attracts and absorbs moisture to some degree - so
make sure you provide ADEQUATE clearance for expansion. Glas filled
should wear very well in that application - just make sure cooling is
adequate as well as the clearance.