On 5/18/2010 Grant Saviers wrote:
...snip...
> I'm thinking that plastic sleeve bearings might be the answer for
> handling the lateral mast force. Teflon /Rulon/Torlon are obvious
> choices if cost is no object. UHMW (ultra high molecular weight)
> polyethylene is a cheap very slippery plastic used for sliding bearings
> and low speed rotating bearings. It's cheap but can't handle much UV,
> so will need covering up from sunlight. ...snip...
Another problem with UMHW is that it cold flows, which is why I was saying a
thrust bearing made if one of the glass reinforced self lubricating plastics
(say a glass reinforced teflon - of course pure teflon cold flows too)
I wonder of a coating of say Molgice would be perfect. As you said, something
like Rulon 142 would probably be perfect (for that matter Torlon)
I can't see it being THAT expensive - the real cost on say Torlon would be in
the making of the mold - run off a bunch or rings the right size so that you
don't end up with 90% of the material on the floor
--
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