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