[AT] 12,000 lb winches

[Dean Vinson]

Gents, what’s the physics behind the capacity reductions with successive wraps of the cable?   Larger diameter spool = longer moment arm = takes fewer pounds to reach the rated torque?

 

Dean Vinson

Saint Paris, Ohio

 

 

From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of Dean VP
Sent: Saturday, April 20, 2024 6:09 PM
To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
Subject: Re: [AT] 12,000 lb winches

 

Yup.  I don't know how many feet are on each wrap or how many wraps there are yet but my guess with an 80' plus cable the first wrap is probably un wrapped in less than 20'. Looping back 20' gains more in pulling power than is lost in the wraps on the winch.  On a straight pull back one could add an additional extension cable to keep the wraps on the winch but it is kind of a hassle to disconnect the extension rope and connect direct. Makes sense if one is pulling something out of a mess of in the distance but not sure if it makes much sense of the tractor can be backed up to the back of the 20' trailer.

 

On Saturday, April 20, 2024 at 02:39:42 PM PDT, <rdhaskell at juno.com <mailto:rdhaskell at juno.com> > wrote: 

 

 

Or shorten the cable.

 

On Sat, 20 Apr 2024 21:26:46 +0000 (UTC) Dean VP <deanvp at att.net <mailto:deanvp at att.net> > writes:

Ron,

 

All the more reason to buy a winch with excess capacity.

 

On Saturday, April 20, 2024 at 01:49:03 PM PDT, <rdhaskell at juno.com <mailto:rdhaskell at juno.com> > wrote: 

 

 

Remember the 12,000 rating is on the first wrap of the cable, once you

start the second wrap deduct 10%.  Another 10% on the third, and 10% more

on the fourth.

 

Ron Haskell

Riverside CA

USA

 

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Ron Haskell
Riverside CA
USA

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