Can’t speak for every gin pole pully the Rohn 25/45/55 pully is a 2” aluminum
rolling on a through rod in it’s aluminum cast housing.
I also use a IIX gin pole. I use it for 55/65(10 ft sections) and AB105 and
chrommolly mast inseartions
IMO it still has a 2” ¾ inch MAX pully wheel it pulls smoother then the Rohn
one !! nothing scientific just my .02
Wayne ,W3EA
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
From: K9MA<mailto:k9ma@sdellington.us>
Sent: Monday, December 2, 2019 11:54 AM
To: towertalk@contesting.com<mailto:towertalk@contesting.com>
Subject: Re: [TowerTalk] rope strength
> On 12/1/2019 11:40 PM, Grant Saviers wrote:
>>
>>
>> The second problem is there is a lot of friction in the pulleys. I've
>> seen tests for hardware store ones where the output tension is only
>> half of the input tension.
I can confirm that. When I put up my Rohn 25 last summer, I pulled the
rope to lift the sections. I can tell you it took a whole lot more than
40 pounds of tension to lift them. Obviously, the pulley on the Rohn gin
pole was not one of the good ones.
73,
Scott K9MA
--
Scott K9MA
k9ma@sdellington.us
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