[TowerTalk] Noob question re: Thrust Bearings

[David Robbins]

I have never seen one slip in the clamp ring.  A bolt through would also
work but that would put a weak point where there is the most force on the
mast.  A U-bolt above the bearing is probably a better alternative if extra
clamping power is needed.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: telnet://k1ttt.net:7373



-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
scott at nx7u.net
Sent: Saturday, May 09, 2020 18:24
To: towertalk at contesting.com
Subject: [TowerTalk] Noob question re: Thrust Bearings

I've never found any clear explanation of how thrust bearings are
practically implemented.
If the bearing is to "hold up" the antenna (so that the rotator doesn't have
to), I assume that it's the force from the four radially-oriented bolts that
do so?  It seems to me that over time the mast would slip.  
Is that really not an issue with sufficient bolt torque?
It seems to me that the mast should be pinned through the bearing
instead--that is, a through-bolt that goes through holes drilled in the
mast.
What obvious (but not to me) thing am I missing?
Thanks,
NX7U
45 years active & never had a rotator bigger than Radio Shack :-)
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