Mac,
Not from the show me state BUT a skeptic , in the 80’s when these GUY GRIPS
started creeping into the ham community ( my limited knowledge time wise)
There were two different ones available locally for ¼ “ EHS ( strand) 5
wire wrap and a 6 wire wrap.
Having access to a QC lab in a truck manufacturing CO ( Mack Trucks) We set up
an analisys with proper OD HD thimbles and with out thimbles ( Read1/2 “ Dai.
Pull point)
With Rohn 1/4:” EHS with it’s 6000lb breaking strength. IF memory servs me
the EHS started to delamanat, elongqate and deform around 9400 lb. pull . The
Thimble also decreased it’s open end dimension. At this point and above the
strands of the cable started to elongatete and shear ( read , catastrophic
failure was not a big bang but a strand by stran domino.
The Head Mechanical Eng. Predicted the thing PLP grip to fail before the
strand WRONG. He was really into it now. Hence his sugjestion to removal of
the thimble and just using the pulling haws ½ dia. Pull pin and saying NOW
the improper installing will cause a PLP big grip failure !
Again the PLP line product no mater 5 wire or 6 wire did not fail.. the Rohn
¼ EHS failed before the PLP product did every time ( there were 6 full
tests ) .
This was tested with only Rohn ¼ strand wire and PLP 5 and 6 wire Big Grips
Made a beleaver out of me
Wayne W3EA
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
________________________________
From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Mac
<libbysales@austin.rr.com>
Sent: Wednesday, February 20, 2019 12:02:04 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] PLP "Big Grips"
Just from the refraction of the material and then the feel it just near
has to be some form of Silica, but best of all do they ever work well..
I've never heard of a failure if even done half correct. When i first
discovered these I was skeptical and reviewed with our head of Electric
utility .. They swore by them and never a problem in long term use and
maintenance free. And PLP is the father of these having led the way best
i experience.
mac/mc w5mc
On 2/20/2019 12:12 AM, Byron Tatum wrote:
> Just out of curiosity-- I was wondering if anyone knew the exact
> materials that are used to coat the inner surfaces of the PLP "Big Grips"
> such as BG-2144 (1/4") or BG-2146 (5/16")? It appears to me that a gritty
> material is in combination with an adhesive. I was reading about the
> manufacturing process used to make a very similar dead-end grip by a PLP
> competitor and it is mentioned the strands of grip are dipped in an adhesive
> to bind them together, then they mention the final application of the
> abrasive material to inner surfaces. Just curious if anyone knew what the
> materials used were, especially the abrasive/grit material. I recall seeing a
> gritty material dropping out of older grips (of these exact two mentioned)
> when taking apart older guy assemblies, plus seeing thin strips of solidified
> adhesive coming off of the strands of grips. Was wondering if the gritty
> material is a silica compound or something else??Thanks, Byron W5FH
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