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Old 21-07-2014, 06:23   #1
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Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

To stop the shackle pin coming out, the previous owner had 'moused' the anchor shackle with thin nylon twine , . Way better than nothing. Concerned that this may chafe and let go, I replaced it with 6mm stainless wire.
My question :
Do we have Consensus on "How" to stop the pin coming out of the anchor shackle ?
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Old 21-07-2014, 06:46   #2
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

It's pretty much what you did. Seize it with wire. Put a number of loops in it for security.

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Old 21-07-2014, 06:53   #3
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I peen over the end of the shackle bolt. When time comes to remove it, I have large bolt cutters.
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Old 21-07-2014, 07:00   #4
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

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Originally Posted by Scare_Rab View Post
Do we have Consensus on "How" to stop the pin coming out of the anchor shackle ?
Have you forgotten this is Cruisers Forum? Consensus? Surely you jest.

Stainless steel wire is the traditional material for securing a shackle pin and it works quite well for an anchor that is frequently in and out of the water. I discovered it is not a good idea for an anchor that stays in the water for extended periods. On a mooring system I had down for two decades I discovered the stainless wire cut a groove in the galvanized shackle because of the galvanic couple. I used nylon wire ties after that and had no problems.

The nylon twine you mentioned would probably be better than the wire ties because it is stronger, but you don't need great strength to keep the shackle pins from working loose.

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Old 21-07-2014, 07:03   #5
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

Galvanized shackle should have galvanized seizing wire I would think.
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Old 21-07-2014, 07:32   #6
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I use Monel wire.


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Old 21-07-2014, 07:36   #7
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I'd go with Monel too
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Old 21-07-2014, 07:39   #8
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I've used monel wire for over 30 years. The shackle will need replacing before the wire. Chuck
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Old 21-07-2014, 07:39   #9
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

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Originally Posted by highseas View Post
Galvanized shackle should have galvanized seizing wire I would think.
Not necessarily.

With small components like sizing wire it helpfull if they are more noble than the surrounding metal. The very small amount of sezing wire will have minimal galvanic effect on the much larger mass of galvanised chain and anchor. On the other hand if the roles are reversed the small mass of the wire can corrode very rapidly. Thus it it more sensible to ensure these vital components are low down on the galvanic scale.

Monel is the gold standard for sizing wire, but SS is fine. Cable ties are vulnerable to abrasion and UV and are not a great choice for this application.

Alternatives to sizing wire are locktight, or peening the end of the pin.
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Old 21-07-2014, 09:12   #10
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

Please excuse the ignorance but what is Monel wire and why is it so good. Also what gauge or thickness should be used

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Old 21-07-2014, 10:18   #11
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

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Please excuse the ignorance but what is Monel wire and why is it so good. Also what gauge or thickness should be used

Brian
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Monel is a nickel/copper/iron alloy highly resistant to corrosion (far more so than galvanized iron or stainless). It's use is limited as it is very difficult to work. Seizing wire of monel will exist long after the galvanized iron pin it secured has wasted away. (Note that seizing and mousing are similar but are not the same thing at all.)
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Old 21-07-2014, 10:36   #12
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I've used Monel for over forty years exclusively.
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Old 21-07-2014, 10:44   #13
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I do a lot of safety wiring, normal is .032, but for things like this maybe the thicker .041 is called for.
Monel is the best, but hold onto your wallet, it ain't cheap. Good news is a 1lb can will probably last you as long as you live.
SS safety wire is about 1/3 as expensive
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Old 21-07-2014, 13:32   #14
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I use stainless steel lock wire on my shackles
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Old 21-07-2014, 13:39   #15
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

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I use stainless steel lock wire on my shackles
We also use s/s seizing wire. It gets broken eventually and one just does it up again before you drop it again. You'd be amazed how many people don't mouse the pin, though, just walk through a marina and look!

Monel may be better, especially if you just happen to have it for something else, but the s/s has worked well for us..

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