A long time ago I had a US Tower with a flange style bearing supplied
with the tower and there were no fit issues, or any issues for that
matter. Flange bearings are readily available in a lot of sizes under
3". Maybe a 2 3/16 of 55mm bearing would fit a 2" mast OK? A 3" should
work with a 2 7/8 mast. Finding this style bearing for a 3" galvanized
mast may be more of a challenge but I have not looked. I tried Rohn's
bearing once too. The first one that I purchased did not turn brand new
out of the box and the replacement started getting tight after six
months of use in Aruba.
John KK9A
STEVE, NR4M wrote:
-------------------------
Jim,
How is the fit on the ID?
So, many of this type of bearing will not work due to the tight
tolerances. A mast that's been galvanized usually will not fit.
73 de Steve, NR4M
Sent from my iPhone
On Mar 11, 2019, at 8:23 AM, Jim <jimw7ry at gmail.com> wrote:
This is what I have used for 30 years. Same bearing on 4 different
towers in various locations. In Southwest Washington, we got 70" of
rain per year. Held up fine.
https://www.ebay.com/itm/UCF211-32-2-Square-4-Bolt-Flange-Bearing/362153741170?hash=item54520b8b72:g:a2QAAOSwnTdaA6IQ
I do put a cover over the top of it with a vent pipe roof jack (just
the rubber part) to keep water out.
Thanks
73
_ Jim W7RY_
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