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Re: [TowerTalk] Wire Rope Crushed on Winch Reel Query

To: Dennis Vernacchia <n6ki73@gmail.com>
Subject: Re: [TowerTalk] Wire Rope Crushed on Winch Reel Query
From: Dan <n5ar@air-pipe.com>
Date: Wed, 27 May 2009 10:54:46 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Dennis, you did not tell us what the diameter of the drum is and I think 
therin lies the problem. Typical tower winches use large diameter drums 
to avoid crushing the cable. They require a larger motor to turn the 
winch than would be needed with a smaller diameter drum. I suspect the 
cable is not the problem. My TX472 tower uses a small hand winch to lay 
the tower over and it tends to crush the cable. Is your winch hand 
powered or motor driven?
73, Dan, N5AR

Dennis Vernacchia wrote:
> Can anyone tell me why a wire rope cable would tend to
> crush itself in the layers on the center hub of a winch ?
>
> I purchased the wire rope at a Marine rigging company in San Diego
> as the cheezy cable I saw at Home Depot and also a  Ace hardware affiliated
> store
> didn't look up to the task !
>  ( Are the Marine rigging places also now getting wire rope from China !?
> I would bet regular hardware stores are, but hopefully not the Marine
> rigging places )
>
> The cable was 0.260 inch diameter galvanized steel and rated for 6,000 to
> 7,000 lBs.
> ( I did tell the Marine rigging vender that the cable was going to be used
> on a winch
> and not for just a staic line and the cable does aopear to be fleixible
> enough
> to deal with being wound on a typical winch hub.)
>
> The calculated weight was 1440 lBs. in the tower tilting system.
>
> There was at least 1 row of cable on the reel under the crushed section
> which is
> about 3 inches in length and there was at least 1 or 2 rows of cable on top
> of the crushed section.
>
> I was careful to try to keep the cable evenly spaced on the small center hub
> of the
> *Dutton*-Lainson 2 speed winch which is rated for several tons.
>
> I also need to know what to specify when I go to get a new cable made.
>
> I can e-mail photos of the crushed section if anyone is interested.
>
>
> 73, Dennis N6KI
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