John Brosnahan wrote:
> I have been making bearings out of UHMW (ultra high molecular weight)
> polyethelene material--fairly cheap to buy--you can saw it to size on a
> table saw and cut a hole in the center with a hole saw. Never needs
> lubrication and can't rust. Just drill it out to fit the holes in the top
> for the TB-3.
This sounds interesting, but I am dense. If you have a flat sheet of
this material and drill it to let the mast pass through, what "sits" on
the plastic to bear the mast weight?
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