[TowerTalk] Yaesu GS-065 thrust bearing

[Jim Thomson]

Date: Mon, 02 Jun 2014 12:12:02 -0500 (CDT)
From: David Robbins <k1ttt at verizon.net>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Yaesu GS-065 thrust bearing
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I have a tb-3 that has been in the air for almost 30 years now, has outlived several rotors, a bunch of antennas, and a set of guy wires... and I haven't looked at it since I put it up there... it just keeps on turning.  I have several others on different towers that have been up there 15 to 20 years that have never been touched either.  just how old are these tb-3's that are requiring all this work???  have they been used in a salt spray environment?

## I had  a pair of  NEW Rohn  TB-4 bearings on my trylon tower 10 yrs ago.  All  3  set scews, the .375 inch ones..every 120 degs,  all rusted out asap, including the lock down nuts !   They seized up, and I had to drill em out.   They also made this grinding noise after only a few months.  I was not impressed.   I use the peer bearings on my UST-  HDX-689, two of em.  zero problems.   They come with the eccentric locking collar + grease nipples.  

##  the rohn  TB-3-4 are just ball bearings  riding in an aluminum race.   No way to lube em either.   They are NO bargain for the $$  either.  Use a  real thrust bearing....if you want it to last.  

Jim  VE7RF