[TowerTalk] Which Rohn thrust bearing to use

[Tim Duffy]

You may want to look at this as well:

https://www.dxengineering.com/parts/dxe-tb-300

The TB-300 was introduced at Dayton this May

73
Tim K3LR

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Jim
Thomson
Sent: Tuesday, December 06, 2016 8:45 AM
To: towertalk at contesting.com
Subject: [TowerTalk] Which Rohn thrust bearing to use

Date: Mon, 5 Dec 2016 15:56:27 -0500
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk at tm.net>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Which Rohn thrust bearing to use

The Fafnir and many others including imports are far better than the TB3 
and 4.

73

Roger (K8RI)

### Anything is better than a TB3 or TB4.   UST uses PEER brand 
thrust bearings for both the big drum, and the mast.  The ones used on the
mast are NOT designed to self align.   The thrust bearings on the big 
drum ARE designed to self align.  They come with a locking collar, that
has a couple of holes, spaced 180 deg apart, on the top portion of the
locking collar.  Just rotate the locking collar CW a bit and it binds tight,
then
use a drift punch  in one of the 2 x holes, and give it a gentle smack. Then
the locking collar wont budge.  Locking collar also comes with a set screw.
Replace it with a SS type, then slop some never seize onto the threads of
both
the SS set screw and also the threads of the collar. 

##  The TB3 /4 although popular, are not cost effective, not for what you
are
getting. 

Jim   VE7RF

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