Swivel Recovery Points

Mongo

Mongo

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Apr 19, 2004
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yeah, don't install them…and buy a set of these from me...:D
 

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K-rover

K-rover

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Jan 15, 2010
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Raleigh, NC
Those are known as Hoisting rings. Derived from heavy lifting, never meant for side loading. But Ive never heard of one failing so.....
 
mgreenspan

mgreenspan

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Feb 28, 2005
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Briggs's Back Yard
K-rover said:
Those are known as Hoisting rings. Derived from heavy lifting, never meant for side loading. But Ive never heard of one failing so.....
Click to expand...

So here's what I don't get. IF it is designed for lifting at any combination of the 360 degrees of swivel and 180 degrees of pivot, why is pulling something any different than lifting it? Can't you lock it in a position by tightening the bolt so it doesn't pivot?

I don't know anything about mechanical engineering/physics of what is going on for this stuff. Airplanes is my thang.
 
garrett

garrett

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Jun 18, 2004
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www.blackdogmobility.com
mgreenspan said:
http://www.roverparts.com/Parts/TFSRP This Terrafirma part or any other brand similar.

I've read multiple times where people shit on these types of recovery points while screaming about dynamic and static loading. Is there a correct way to use these for recovery? My googling couldn't return anything useful.
Click to expand...

What are those rated for? Regardless it would seem that much of what you can do with them depends on the strength of what they are attached to.
 
Mongo

Mongo

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Apr 19, 2004
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Shock loading is the issue…a lift is a constant pull, while recovery is more dynamic.
 
Mongo

Mongo

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The problem is that the ring is held by snap ring and the ring on the swivel pin. The metal on the bumper will weaken with each pull and will fail. Yeah they work, but it's not the best design.
As for how you get out, yeah common sense is assist the pull...

Just my .02..
 
P

P38

Well-known member
Mar 8, 2014
157
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Michigan USA
Mongo said:
The problem is that the ring is held by snap ring and the ring on the swivel pin. The metal on the bumper will weaken with each pull and will fail.
Click to expand...

What's the problem? Is it the snap ring? Why will the bumper weaken? What's your basis for such comments?
 
mgreenspan

mgreenspan

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Feb 28, 2005
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Briggs's Back Yard
Mongo said:
The problem is that the ring is held by snap ring and the ring on the swivel pin. The metal on the bumper will weaken with each pull and will fail. Yeah they work, but it's not the best design.
As for how you get out, yeah common sense is assist the pull...

Just my .02..
Click to expand...

Tracking. Solution would be weld the swivel base, but at that point why would you not go with basic recovery point as pictures above.
 
Mongo

Mongo

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P38 said:
What's the problem? Is it the snap ring? Why will the bumper weaken? What's your basis for such comments?
Click to expand...

It's called experience, which is something people never seem to take into account.

The problem is there is very little material holding the hoist ring. As the metal fatigues, the hole can and will wallow out. Add rust to formula and then it will fail, probably when some moron attaches a strap and takes a running start at pulling you out...

And I'm not talking about using a kinetic rope,
 
Mongo

Mongo

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mgreenspan said:
Tracking. Solution would be weld the swivel base, but at that point why would you not go with basic recovery point as pictures above.
Click to expand...

A bolt on recovery point is as strong, and in some cases, stronger, than a welded one...depends on how's it's done.
 
P

P38

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Mar 8, 2014
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Michigan USA
Mongo said:
It's called experience, which is something people never seem to take into account.

The problem is there is very little material holding the hoist ring. As the metal fatigues, the hole can and will wallow out. Add rust to formula and then it will fail, probably when some moron attaches a strap and takes a running start at pulling you out...

And I'm not talking about using a kinetic rope,
Click to expand...

So, to be sure, here, it's NOTHING to do with the snap ring as that's not load bearing. It's that there's little load bearing surface on the back side of the bumper and that if the shoulder were bigger - or even a plate were welded on, it would assist in preventing the "wallowing" you're referring to. Of course, any rust, in any loaded location will not help, even with a bolted recovery point (just to be clear rust is common to BOTH types)
 
Mongo

Mongo

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Apr 19, 2004
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Correct...
The snap ring just holds the swivel hoist in place. These are not designed for, or meant to be used for dynamic loading. Yeah, get one that's rated for a zillion pound hoist, but in the end it's the wrong tool for the job…but hey, they look cool hanging from your bumper
 
mgreenspan

mgreenspan

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Feb 28, 2005
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Briggs's Back Yard
They look symmetrical, I don't know about cool. Every mention of them before just became so emotion filled that I could never figure out the actual why. Thanks for esplaining.
 
N

number9

Well-known member
Nov 21, 2015
196
0
Coastal Georgia
Mongo said:
The problem is there is very little material holding the hoist ring.
Click to expand...

+1

That ring is of poor design. If the base diameter was 2/3x larger the shaft would go through same size hole in bumper. Larger base would spread the load on backside of bumper. They're too cheap to have it machined starting with a bigger piece of metal stock and/or just have no clues about producing/selling a quality product.

Do these bumpers folks are selling have reinforcement plates behind the holes?

......
 
N

nickb857

Well-known member
Apr 21, 2004
1,388
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Las Vegas
Crosby makes bolt on swivel lifting rings if you really want to use something like those. They are expensive and they start to get pretty big once you get to any size with a useful Load rating. I have a some from work that bolt on with a 3/4" nut but I've never done anything with them. I would just go with the ones Frank makes or something similar.
 
Mongo

Mongo

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I need to find the pic of one launched thru the rear of a jeep in upstate Ny... Those are good options from EE
 
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