[TowerTalk] [Bulk] Fwd: WTB Rohn 25G tower insulator

[Grant Saviers]

I have some white UHMWPE that was used as combo thrust and axial 
bearings in side arm rotators, sections are over 1" thick.  All are 
pretty badly crazed and not quite cracked thru after 7 years in the OR 
"sun".  I didn't make these, so I don't know the grade or supplier of 
the material but am cautious about the UV stability of UHMWPE as a 
result.  I use black material where UV exposure is likely.  TIVAR info 
on UHMWPE, many grades: http://www.bayplastics.co.uk/polyethylene.htm

Generally, natural UHMWPE is not considered to be UV stable.

I find it hard to machine to tolerance since it is so slippery and 
gummy.   Very sharp, correct relief tooling is required.  Otherwise it 
is a very useful material and cheap.

Grant KZ1W

On 12/15/2015 13:31 PM, Hans Hammarquist via TowerTalk wrote:
> UHMWPE is available at Walmart (at all places). It's called "TIVAR GRA0133002037" as sheet Stck, 12 In.x 24 In.x 0.500 In. @ $87.84.
> Hans - N2JFS
>
> .
>
>
> -----Original Message-----
> From: Andre VanWyk via TowerTalk <towertalk at contesting.com>
> To: towertalk <towertalk at contesting.com>; rcm <robrk at nidhog.net>
> Sent: Tue, Dec 15, 2015 3:17 pm
> Subject: Re: [TowerTalk] WTB Rohn 25G tower insulator
>
> I will use these if all fails. UHMWPE material will outlast fiberglass in
> the sun too.
>
> 73's
> NJ0F
>
> -----Original Message-----
> From: rcm
> Sent: Tuesday, December 15, 2015 1:40 PM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] WTB Rohn 25G tower insulator
>
> http://www.wb0w.com/tower_insulators
>
> On 12/15/2015 01:06 PM, Andre VanWyk via TowerTalk wrote:
>> I am getting parts together for a 160m vertical, using Rohn 25G sections.
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