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Re: [TowerTalk] Thrust bearing / rotor load

To: JP Lyet <>
Subject: Re: [TowerTalk] Thrust bearing / rotor load
From: Brian Machesney <>
Date: Fri, 12 Jun 2009 08:16:35 -0400
List-post: <">>

I inquired directly to Rohn for a definitive answer to this pesky question.
Contrary to the definition of "thrust bearing" that appears in other
sources, Rohn says their TB series are meant only to bear lateral loads
(i.e., loads perpendicular to the the bearing's axis of rotation); they are
not meant to bear vertical loads (i.e., loads parallel to the the bearing's
axis of rotation).

73 -- Brian -- K1LI

On Fri, Jun 12, 2009 at 2:41 AM, JP Lyet <> wrote:

> Altho this thread may have worn thin, after reviewing the archives, it
> is still unclear as to the proper (most accepted) method to distribute
> the load. Conceptually, should the TB-2 or T2X take the majority of a
> 100# load?  This TB has a locking ring and single(1) set screw. A mast
> locking collar is welded to the bottom of the upper support plate for
> installation adjustment purposes.
> Prior to mounting the antenna, what is: 1- the concept and 2-the
> standard method of sharing the load?  (Mast is 4' above & 6' below the
> TB.)
> Many tnx.
> 73, Paul W3PL
> via 3G
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73 -- Brian -- K1LI

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