new shackle

seventyfive

Well-known member
Jan 3, 2010
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over there
#1
i rarely get jazzed up about a new diff guard design, bumper, etc...if they work, great, but they don't minimize or lighten the load. products like that will always be heavy and somewhat similar in design to achieve the same goal. this shackle weighs nothing, you can keep it in your pocket, it will never rust and seize, you can keep 10 of them in your glove box, hook 2 of them together around your b-pillar if you flop. the uses are almost limitless compared to a standard steel d-ring.
not trying to toot someone's horn, i just think these things are very cool.
 

fishEH

Well-known member
Jan 26, 2009
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Lake Villa, IL
#2
seventyfive said:
i rarely get jazzed up about a new diff guard design, bumper, etc...if they work, great, but they don't minimize or lighten the load. products like that will always be heavy and somewhat similar in design to achieve the same goal. this shackle weighs nothing, you can keep it in your pocket, it will never rust and seize, you can keep 10 of them in your glove box, hook 2 of them together around your b-pillar if you flop. the uses are almost limitless compared to a standard steel d-ring.
not trying to toot someone's horn, i just think these things are very cool.
They are cool. Except in the application you have pictured. It appears that "shackle" is nothing more than thick synthetic winch line. You wouldn't catch me using it on a recovery point like on that front bumper. Any kind of side to side movement will have a sawing effect and will quickly destroy your "shackle". Those "shackles" are often sold as a tube-saver for wrapping around round tube(like a roof rack) in the event of a roll over.
 

antichrist

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Sep 7, 2004
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Atlanta, GA
#3
Interesting.
Just keep in mind that the extreme angle created when it's under load will significantly reduce the load capacity and the choker loop will reduce the capacity by up to a further 50% of the rope strength, depending on how it's oriented.
Shock loading, like during a dynamic recovery, can further reduce it.
 

Mongo

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Apr 19, 2004
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#4
depending on the rubber jacket, it may last a while...strength ain't gonna be problem, durability will, it's rated for 60 or 70k if it's 1" spectra. Even on a sideload, your gonna break your winchline before that goes...
 

antichrist

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Sep 7, 2004
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Atlanta, GA
#5
Side loading has no bearing on it, at least not in the above picture.
It's ultimate capacity depends much on how it's rigged, though a lot of the reduction in capacity is caused by how it's attached to the vehicle.

Worst case, the capacity could be reduced 50% by the choker so that's down to 35k capacity (70x.5).
Assuming the tight radius bend further reduces it by only 30% (I think it's actually more) that's another 21k off the capacity (70x.3).
So now you're down to 14k breaking strength. (35k - 21k)
Allowing a paltry 3:1 safety factor and you're down to a 4.5k WLL

I don't know about you, but I'd never use a 2.25 ton WLL shackle with any of my winches.

For safe fixed pin bends the diameter of the pin should be ropeDiameter x 3. In this case, 3".
 
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Mongo

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Apr 19, 2004
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#6
I wouldn't use it in that app, but I can see it's purpose...it's all moot anyways, how many guy's double the pull and actually rig shit right. Can't tell you how many time's I've watched knuckleheads on single line pull...
 

seventyfive

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Jan 3, 2010
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over there
#12
Mongo said:
I wouldn't use it in that app, but I can see it's purpose...it's all moot anyways, how many guy's double the pull and actually rig shit right. Can't tell you how many time's I've watched knuckleheads on single line pull...
there were a group of jeep guys winching one of their buddies truck, straight pull, and the winch truck wasn't even anchored to a tree. they let us help, snatched a tree about 9 o'clock position and double backed. the guy who was winching, no shit, asked what the snatch block was and where he could buy one!

im going to chamfer and file the tabs on the bumper, just took a quick picture to try to show the size.
 

fishEH

Well-known member
Jan 26, 2009
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Lake Villa, IL
#14
seventyfive said:
im going to chamfer and file the tabs on the bumper, just took a quick picture to try to show the size.
Why not just mount a shackle to the tab and be done with it? Then you can just hook that synthetic shackle thingy to it if you simply must use it in that application.
 

Mongo

Well-known member
Apr 19, 2004
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#15
actual 5/8" spectra is rated at 50kish so it seems your math works Tom, anyways good to have ya back...

as for knuckleheads and winching, it falls right in line with guy's who say using a hi-lift to winch with is a good idea and plenty safe...
 

greenD1

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Jun 22, 2009
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Lancaster, MA
#16
We used these several times a couple weeks ago. Once to pull a 101 up a steep bank. The only thing we had to be careful about was sharp edges. They are easy to use, and even easier to store
 

antichrist

Well-known member
Sep 7, 2004
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Atlanta, GA
#17
I just realized I made a significant omission.
I only mentioned the capacity reduction for the tight radius where it's loaded against the recovery eye.
There will also be a significant reduction in capacity caused by the tight radius bend around what you connect to it, assuming you're connecting your winch line to it for a multi-line pull.

For safer use they should be used with two rope thimbles, one for the recovery eye and one for whatever you connect to it.
 

seventyfive

Well-known member
Jan 3, 2010
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over there
#18
i just wanted to take a quick picture to show the size in relation to my winch line. they are not intended for that application, (if i use it for it's non-intended application, im not advocating someone doing that). having a handful of these adds flexibility when pulling a truck back onto all four tires.
 
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