[TowerTalk] Noob question re: Thrust Bearings

[Art Greenberg]

> My choice is a UV resistant UHMW radial top bearings for low cost, no 
> maintenance, long life, and low friction.  A 6x6x4" thick block ($47) is 
> what I made for the 3" mast radial bearing with 500# loading.  In 
> perfect condition after 6 years.

Grant,

I'm curious about this. Some questions:

- How did you drill the hole for the mast?

- How much oversize? I imagine its not very critical, is that true?

- Is any particular color better with respect to UV and other environmental exposures?

Thanks, and 73.

-- 
Art Greenberg
WA2LLN
art at artg.tv