[TowerTalk] Looking for a TB4 bearing - need not be pretty

[john at kk9a.com]

If they are made like the TB3, I would avoid it.  I bought a TB3 for my
Aruba station and the brand new one was difficult to turn.  I returned it
and received a replacement which was better.  After a year of use it was
rough turning. I am sure that some grease would have helped but you are
not supposed to grease them. I replaced it with another brand attached
with a homebrew mounting plate.

John KK9A


To:	towertalk at contesting.com
Subject:	Re: [TowerTalk] Looking for a TB4 bearing - need not be pretty
From:	"Roger (K8RI) on TT" <K8RI-on-TowerTalk at tm.net>
Date:	Sun, 07 Jun 2015 23:53:06 -0400
List-post:	<towertalk at contesting.com">mailto:towertalk at contesting.com>
Hi Bart,

Lets see...Feel like a washboard gravel road. I had two and they felt that
way to me when new. They definitely do not feel like you expect a bearing
of that price to feel. They've since picked up a bit of wear. Wear as in
the top section sets down on the base real tight and the inside of the
bottom race is now like a razor. IOW, they are shot!

There are much better bearings with 2 and 4 hole mounts for a half to a
third (or less) cost, complete with zerk(s) There are those using
centering bolts, or the off center locking collar. They are available in
SS as well for a bit more money.

Try bearings.com or something similar.  I can't find the original links

73

Roger (K8RI)


On 6/7/2015 9:17 PM, Bart Jahnke wrote:
All,

I am looking for a Rohn TB4 bearing.

New - would be nice - NOS okay too...

Used - be nice if it came with hardware... Need not be a beauty queen...
But prefer it not feel like a washboard gravel road when you turn it.

Anyone have anything on the shelf collecting dust, before I go to Ebay...

Thanks and 73

Bart W9JJ