I'm not totally sure about this but there is a uhmw we use in our
materials handling chutes that is supposed to be uv stabalized.
Its called "TYVAR 88". There are several grades of TYVAR but
the 88 is supposed to be better suited to uv environments.
I used some for cable guides on top of my tower and its been up
about two years. Haven't been up to check on it yet this year but
as of last fall it was holding up good. I am on the southern wv/va
border so my uv exposure is less than many of you.
JerryC
KC8TES
----- Original Message -----
From: "Robin Midgett" <robin.midgett@vanderbilt.edu>
To: <Bgsalesmel@cs.com>; <towertalk@contesting.com>
Sent: Tuesday, April 15, 2003 3:49 PM
Subject: Re: [TowerTalk] Thrust Bearing = UHMW cutting boards...
> The natural color (white) UHMW will last ~2years in the sun here in the
> southeast before the UV breaks it down into a crumbling mess.
> Nylatron, on the other hand, is a similar plastic but impregnated with
> graphite and an UV blocker, making it an excellent choice for outdoor
> bushing applications. It is available from most plastics dealers; use the
> yellow pages. That is what I use in the bushings for the SideWinder.
> www.idctechnology.com
>
>
>
> At 05:42 PM 4/13/2003 -0400, you wrote:
> >Hello to all:
> >Just a note about these cutting boards. Most restaurants use these and
> >have to replace them from time to time for health department reasons.
When
> >they do, they just toss them. They are usually large sized and thick,
with
> >some knife wear on both sides...makes no difference for our use, eh?
> >
> >Just ask the manager of your local hangout to let you know when this is
> >about to happen and pickup their rejects for free... Should be enough for
> >a lifetime.
> >
> >Regards,
> >Mel Frost
> >KD7DCR - Coeur d'Alene, ID
> >
> >
> >
> >
> >
To: <towertalk@contesting.com>
> >Date: Mon, 7 Apr 2003 20:09:14 -0700
> >From: "Jim Lux" <jimlux@earthlink.net>
> >To: <n8de@thepoint.net>
> >Cc: "\(Reflector\) TowerTalk" <towertalk@contesting.com>
> >Subject: Re: [TowerTalk] Above the Thrust Bearing
> >Message-ID: <002701c2fd7c$3c87cce0$02a8a8c0@office1>
> >References: <008b01c2fd5a$06c409b0$1902a8c0@MainDesktop>
> > <3E922327.1020306@thepoint.net>
> >Content-Type: text/plain;
> > charset="iso-8859-1"
> >MIME-Version: 1.0
> >Content-Transfer-Encoding: 7bit
> >Precedence: list
> >Message: 10
> >
> >Don't bother with Teflon... use High density (UHMW) polyethylene cutting
> >boards... Less than $10 at your local discount store.. Very good
dielectric
> >properties, easy to cut (make sure that saw is SHARP), and almost as low
a
> >friction coefficient as PTFE.
> >Unless you were planning to heat your antenna up hot enough where the PE
> >starts to flow....?
> >
> >----- Original Message -----
> >From: "Don Havlicek" <n8de@thepoint.net>
> >To: "Jerry K3BZ" <k3bz@arrl.net>
> >Cc: "(Reflector) TowerTalk" <towertalk@contesting.com>
> >Sent: Monday, April 07, 2003 6:17 PM
> >Subject: Re: [TowerTalk] Above the Thrust Bearing
> >
> >
> > > Jerry,
> > > Get some Teflon sheet and cut a piece to fit. Should last a
lifetime.
> > > Don
> > > N8DE
> > >
> >_______________________________________________
> >
> >See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> >Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> >any questions and ask for Sherman, W2FLA.
> >
> >_______________________________________________
> >TowerTalk mailing list
> >TowerTalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
>
> Thanks,
> Robin Midgett KB4IDC
> VHF+ Glutton
> God Bless America, in God we trust.
> Southeastern VHF Society 2003 Conference
> April 25-26 Huntsville, AL
> www.svhfs.org
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
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