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  #1  
Unread 12-18-2015, 09:36 AM
MarAgt MarAgt is offline
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Default Shackle Sizes & suggestions

What size shackles are these?

Is there a particular brand and/or size people prefer?

Don't know if I should get 3/4" or 7/8". They run from $13.00 no name to $43.00 Warn shackles.

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Unread 12-18-2015, 10:28 AM
RF2200 RF2200 is offline
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7/8" high strength alloy is the correct choice. Made in America, because Americans are better. Skookum is best, then Columbus McKinnon, Crosby, and Campbell. Crosby 7/8" G-209A is probably the best value/strength ratio. I believe that AEV has the 1" Crosby G-209 on their trucks but that shackle is not the best choice.

Buy the Skookum 7/8" 263 shackle if you want the best. Buy the Crosby G-209A, Columbus McKinnon M653A , or Campbell 5411495 if you cannot afford the best. Note that the Crosby G-209 and the Crosby G-209A are not the same.

Warn shackles are made in China and are a poor choice and poor value.
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Last edited by RF2200; 12-23-2015 at 06:57 PM.
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Unread 12-18-2015, 11:11 AM
RF2200 RF2200 is offline
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Also, you should note that even these 7/8" shackles are not rated to attach to a snatch block with a Warn 16.5 Ti winch. The snatch block effectively doubles the force on that part of the rigging if the lines are parallel. You would need one of the anchor shackles below.

Skookum 1-1/8" 263
CM 1-1/4" M656A
Crosby 1-1/8" G-209A
Campbell 1-1/4" 5412095
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Last edited by RF2200; 12-23-2015 at 09:07 AM.
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  #4  
Unread 12-18-2015, 11:56 AM
MarAgt MarAgt is offline
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Quote:
Originally Posted by RF2200 View Post
Also, you should note that even these shackles are not rated to attach to a snatch block with a Warn 16.5 Ti winch. The snatch block effectively doubles the force on that part of the rigging if the lines are parallel. You would need one of the anchor shackles below.

Skookum 1-1/8" 263
CM 1-1/4" M656A
Crosby 1-1/4" G-209A

Perfect thanks. And, 1 1/8" - 1 1/4" shackles will fit in the AEV tow points?
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  #5  
Unread 12-18-2015, 12:22 PM
RF2200 RF2200 is offline
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No. The 1"+ shackles are not for the AEV tow points.
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Last edited by RF2200; 12-18-2015 at 12:25 PM.
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Unread 12-18-2015, 12:25 PM
RF2200 RF2200 is offline
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Get the larger anchor shackle just for a snatch block if you have one. Use the 7/8" anchor shackle for your bumper and the end of your winch line. If you never use a snatch block and never do a double line pull then you should never need the larger shackle
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  #7  
Unread 12-18-2015, 12:40 PM
RF2200 RF2200 is offline
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Many of the larger 15+ ton snatch blocks have a swiveling hook or shackle which would make purchase of an additional shackle unneccesary but if you had something like the Skookum 1000710 Tailboard Alloy Snatch Block you would need a shackle and the load rating of the 7/8" is not adequate.
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Unread 12-18-2015, 01:10 PM
MarAgt MarAgt is offline
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Great information. Thanks all.
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Unread 12-18-2015, 03:12 PM
olyelr olyelr is offline
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Good info.

Quick question. If a snatch block is in use and the end of the winch rope is brought back to one of the shackles at the front of the truck, is the force doubled at that shackle? Or just at the one securing the shackle at the winch point?
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  #10  
Unread 12-18-2015, 04:07 PM
kmcoop7 kmcoop7 is offline
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Default double line pull

in a double line pull the force of the winch is DOUBLE @ the snatch block/anchor point.

So if you connected a strap, shackle and snatch block to a tree all of those components should be rated for DOUBLE the rating of the winch.

The force on each line of the winch, the one out of the winch to the snatch block and then the one from the snatch block back to the shackle on the truck bumper would max out @ the rating of the winch. Each of those lines would have 16.5k of tension with a warn 16.5. Add those up and the snatch block/anchor point have 33k pounds of tension.

HTH
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