For that matter, the upper bearing in my sidemount is made out of a piece
of an old high-density polyethylene cutting board.
73, Pete N4ZR
At 01:35 PM 3/21/2007, ersmar@verizon.net wrote:
>Rob:
>
> Use a block of wood. My Rohn catalog from ca 1987 carried a thing
> they called an Amateur Block (P/N AB) that was intended to be bolted onto
> a flat top plate. It was nothing more than a block of wood with an
> appropriate hole for a mast drilled through it. IIRC it might have even
> been split through the diameter of the hole to allow for some slop in its
> fit around the mast.
>
>
>73 de
>Gene Smar AD3F
>
>From: Rob Frohne <frohro@wwc.edu>
>Date: 2007/03/21 Wed PM 12:06:59 CDT
>To: towertalk@contesting.com
>Subject: [TowerTalk] Inexpensive thrust bearing?
>
>Hi Everyone,
>
>Does anyone have a source for an inexpensive thrust bearing? I have a
>plate on the top of my tower with a hole through it, and was thinking of
>putting a thrust bearing on, but the ones I found were around $50 which
>for my frugal self is a bit spendy for a thrust bearing. It seems that
>there is probably a cheaper way to do this with some kind of automobile
>bearing or a sleeve of pipe and some set screws, etc. Does anyone have
>any advice?
>
>73,
>
>Rob, KL7NA
>--
>Rob Frohne, Ph.D., P.E.
>E.F. Cross School of Engineering
>Walla Walla College
>100 SW 4th Street
>College Place, WA 99324
>(509) 527-2075
>http://www.wwc.edu/~frohro/
>
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