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help me identify this recovery hook please

Teal68

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I've had this 14 or so years and can't remember what it came from, and I'd like to get another one or two of them if possible.

Thanks,
Tyler
 

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ntsqd

heratic car camper
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I'm rather partial to the later CTD's tow hooks. Bolt them to a stout bumper and they also work as a step. Not to mention really fast to use and secure.

i-27KMF3M-M.jpg
 
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Teal68

Teal68

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Yep, my POS '97 GMC had those. I prefer the loops on my F-150 although they do require a shackle.

Jon,
Yea, I'm liking the one on the front of my 2010 Raptor. I like that the bolts for it are in shear rather than in tension like the one posted above.
Tyler

Here's how I mounted the one from the TJ:
 

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ntsqd

heratic car camper
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Regular bolts, like SAE Grade 5's or Grade 8's, are misapplied when loaded in shear. They're not actually designed to be used that way, and when they are they need to be significantly over-sized. The yield shear strength of steel is only ~57% of the rated yield tensile strength.
 
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Teal68

Teal68

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Good info. I had not thought about it like that. I was thinking the clamping force, which is a result of the tensile strength of the bolt, would have to be overcome first. Of course that clamping force may not be that much in reality. I honestly don't know. :(
 

ntsqd

heratic car camper
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Good info. I had not thought about it like that. I was thinking the clamping force, which is a result of the tensile strength of the bolt, would have to be overcome first. Of course that clamping force may not be that much in reality. I honestly don't know. :(
No, that is a real consideration. Your phrasing lead me to think that you thought a shear loading of the bolts was better than a tensile loading.

So long as the bolts are always in tension things are relatively simple. Which requires a high torque installation. Once the hook shifts enough to put them in shear things get complicated.
 
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Teal68

Teal68

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No, that is a real consideration. Your phrasing lead me to think that you thought a shear loading of the bolts was better than a tensile loading.

So long as the bolts are always in tension things are relatively simple. Which requires a high torque installation. Once the hook shifts enough to put them in shear things get complicated.

Looking back my wording was poor for sure. One thing is for sure though...I don't want to be in line of any of this stuff if it breaks (in shear or tensile)! :-[
 

jdbronco

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Bolts in shear should not really be in shear if they are properly torqued. They are there to apply a clamp force which is what is holding everything together.
Just make sure they're torqued where they are supposed to be!
 

ntsqd

heratic car camper
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That isn't always true even when properly torqued. Really depends on the design of the joint.
 
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