[TowerTalk] Which Rohn thrust bearing to use

[john at kk9a.com]

I bought a Rohn TB3 once and was not impressed by it. I could not turn the
first one by hand so Texas Towers sent me a replacement which I used for a
year in Aruba.  I then bought a Create bearing which worked perfectly for
many years with a 2 1/2" mast. There is a recent NCJ article showing a new
TB3 replacement made by DX Engineering which looks to be an improvement
over the Rohn bearing however this will not work with your mast.

John KK9A


To:	towertalk at contesting.com
Subject:	[TowerTalk] Which Rohn thrust bearing to use
From:	Dave Thompson <thompson at mindspring.com>
Reply-to:	Dave Thompson <thompson at mindspring.com>
Date:	Sun, 4 Dec 2016 22:32:09 -0500 (GMT-05:00)

After many years of using a crank up I am switching to a Rohn 45 guyed
tower. I
plan to use my 30 year old laddermast to mount a Tennedyne original T-10 and
then mount my 2 el Cushcraft 40 above that by 9 feet.  I am looking at Thrust
bearings.  I used Fafnir bearings on the crank up but I am looking at the
TB-3
and TB-4 on the Rohn 45.
The laddermast is 2.25" so it looks like I need the TB-4 as the max on the
TB-3
is 2".

Is this right?

73 Dave K4JRB