Where to find rigging pin sizes and strengths.... - SailNet Community
 
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post #1 of 3 Old 03-10-2010 Thread Starter
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Where to find rigging pin sizes and strengths....

The leg bone is connected to the, um... hand bone. The hand bone is connected to the, ur....

While I'm re-rigging my boat I've noticed that the bobstay and headstay wire are of the same diameter. Bad idea, as the angles of the bobstay impart larger loads. So instead of upsizing the wire one size, I've decided that I want to replace my bobstay with stainless chain.

Why? Well it would be more abrasion resistant for when the anchor abraids it or when docking mishaps cause the dock to do the same. Also it will just look cool on my boat. Arrrrr.......

I'm getting a migraine trying to figure out the correct pin size of each toggle, their respective strengths and what pins and shackles fit into what size chain....


Is there a good resource that shows the strength and pin diameter of commonly used forged rigging toggles? How about a resource that shows what size pin goes through what size chain? That would be useful for anchor rode building.

For my specific case I have a 5/8 turnbuckle, which I believe has a 5/8 pin. I'm hoping a 5/8 pin will fit into 1/2 inch chain, but I don't know for sure. At the other end I need a rigging toggle (jaw eye) that has an eye of 1/2 inch and a pin of 1/2 or 5/8. I've found that, but not it's breaking strength. There must be a good table of these values somewhere. I bed SD knows where to find it.

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post #2 of 3 Old 03-10-2010
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Generally, chain will accept a pin one size larger than the link wire diameter—for example, 5/16" chain will accept a 3/8" pin. However, I wouldn't use stainless steel chain. The welds on stainless steel chain links can fail without any visible sign or warning.

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post #3 of 3 Old 03-10-2010
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Generally, chain will accept a pin one size larger than the link wire diameter—for example, 5/16" chain will accept a 3/8" pin. However, I wouldn't use stainless steel chain. The welds on stainless steel chain links can fail without any visible sign or warning.

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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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