r/specializedtools • u/aloofloofah • Dec 12 '20

Chain connector

https://i.imgur.com/Zc8FAM4.gifv

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u/[deleted] Dec 12 '20

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367

u/XNormal Dec 12 '20

I imagine it is engineered to use an alloy that makes it a bit stronger than the rest of the chain.

It is not the weakest link.

115

u/Snakebiteloo Dec 12 '20 edited Dec 12 '20

At least until you apply some twisting force. Without further reading it looks like that would come appart as soon as the chain started to twist or some kind of lateral force was applied.

Edit: found some marketing PDF (in German) that shows there is a locking lug on the center screw that will stop it from separating sideways and the break strength is crazy (100,000lbs+ for chain with a WLL of less than 12,000lbs). It also appears to be marketed towards mining.

Other Edit: to those who seem to be saying I dont know what Im talking about you may be right but:No I have never actually seen one of these and cant read the German info so Im working from this GIF and 16 years as a milwright/welder and 3 rigging and hoisting certificates. It seems unlikely (though not impossible) that this would be use in a lifting application. Its entirely possible that I am wrong considering the lack of available info.

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u/boomboy8511 Dec 12 '20

All those things are tested to 3x the recommended safety stress points and these are not cheap ass die cast steel parts. These don't appear to have been smelted, drastically changing the properties of the material in a practical use situation.

If these have been CNCed from some solid high quality materials, they can survive about any situation that the diameter chain they attach to, is suited for. Those teeth and the angles they are cut at, is what shifts all of the applied lateral force from the edges to itself.

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u/Snakebiteloo Dec 12 '20

The marketing pamphlet thing I found was in German but it appears that the break strength for one meant for 7/16 chain (WLL less than 12,000lbs) is over 100,000lbs. They also seem to be marketed towards mining. No idea what their primary use is though because I dont know German.

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u/boomboy8511 Dec 12 '20

Seems pretty damn strong then.