Posted by Dan Shockley on Sunday, August 19, 2007 at 12:03:29 :
In Reply to: Are you sure? posted by Clint Dixon on Sunday, August 19, 2007 at 11:52:35 :
Clint,
If the additional layers of cable descrease the mechanical advantage of the winch, then wouldn't the shear pin fail at a lower tensile line load with addtional wraps? Electric or mechanical, it doesn't matter. If you have more cable on the drum, it lowers its capacity.
With regard to the rating of the winch, It did change from 8000# to 12000# over its life. I have observed two different size shear pins, and I am sure that is related to the up-rating over the life of the winch.
That said, the 2nd layer rating is an electric winch standard and mechanical winches are normally rated at the last layer. Meaning that they will pull at least the rated capacity at any length.
Be careful when using any winch, and be aware of the compound load! Add a couple snatch blocks and 12-15000 # s of load on that first or second wrap and you have the potential for steel ripping loads...
I alway install 150' cables from AW Direct because they are $125, and have a fiber core that helps with stretch and absorbs some oil to help keep rust away.
Good luck,
Dan
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