anchor chain with rope and chain hook snubber - why?

[vyv_cox]

I would think it is true that a bending load is applied but over such a short lever arm that I cannot see it being any sort of risk of actually bending it. It takes one hell of a force to deform links, far more than most of us will ever experience in anchoring.

I'm not familiar with your bucket type, do you have a link?

 

[DaveS]

I would think it is true that a bending load is applied but over such a short lever arm that I cannot see it being any sort of risk of actually bending it. It takes one hell of a force to deform links, far more than most of us will ever experience in anchoring.

I'm not familiar with your bucket type, do you have a link?

This is Delfin's link: http://www.cruisersforum.com/forums/f118/rolling-hitch-on-snubber-104325.html to a thread on another forum.

On looking again I see I paraphrased slightly. The picture of what I called a "bucket" arrangement is shown in post #6 together with a pelican hook. Post #11 refers to (but does not illustrate) what sounds like the wire type that failed on you, then mentions, almost as an aside, "all other types apply bending force" or words to that effect.

 

[GHA]

........ a view is expressed that this type of hook applies a bending load to the link it's attached to and two alternative designs are pictured which apply an axial load: one like your picture of the weak wire type, and another which I haven't seen before with a sort of bucket shaped attachment. From your work on testing chains etc. do you think there's any substance behind the expressed concern?

The hook type is commonplace in industry for chain shorteners in the likes of crane bridles etc. The ones I've used also have a built up shoulder around where the force gets concentrated in the hook, presumably as industrial lifting has strict legal factors of safety to meet. Not sure what EU regs anchor chain needs to meet but the hook type is fine for industrial lifting. Very likely the same for anchor chain. If the bucket type are the same as the industrial ones then they aren't well suited for anchoring, you need slack in the chain to fit or remove them .

 

[vyv_cox]

A 'Devil's Claw' is the name they give it. A new one for me. It looks slightly less secure than a forged hook and does actually put a bending load on the link, although only the same load as an adjacent link of chain would.

Posts #20 and #24 (I didn't go any further) report good experience with my preferred type, with the same comment regarding it falling off when unloaded, which for me is a bonus, not a nuisance. Considerably easier to attach to the chain than a rolling hitch.