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Old 21-07-2014, 13:44   #16
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I've used SS wire in the past. Now a days, I just put a zip tie on it, after using the big wrench and screwdriver to tighten the pin. Works so far. I have to un twist the chain now and then and a zip tie is easy to cut and install.
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Old 21-07-2014, 13:45   #17
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

My pin isn't seized, but I added a dyneema line acting as a backup, between anchor and bow cleat.
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Old 21-07-2014, 13:54   #18
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

I've never had the wire break since I turned the shackle so that the hole side of the pin faces inboard so that it doesn't catch on the roller when coming up
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Old 21-07-2014, 14:31   #19
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Re: Consensus on "How" to stop the pin coming out of the anchor shackle ?

McMaster-Carr has a 1/4 spool of .032 Monel wire for $21. That's about 80 ft. and should last a while.

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Old 22-07-2014, 08:13   #20
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

I have gone from Monel/stainless to UV resistant heavy duty zip ties, and have not encountered any issues.
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Old 23-07-2014, 01:04   #21
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

How do you seize a recessed hexagonal (allen-headed) pin like this?....



We can't use a conventional shackle as the protruding head fouls where the anchor comes through the stem-head rather than over a deck level bow roller.
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Old 23-07-2014, 02:05   #22
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

Welcome to the forum MeiWenti

Many people use Locktight as is used in a lot of swivels.
An alternative is to use a conventional bow shackle but cut the head of the pin off. If you drill a small hole it can still be moused. See here:
http://www.cruisersforum.com/forums/...es-123394.html

The shackle you show looks like one of the HR series of Whichard shackles. These are very strong, but there is some concern about the the suitability of HR stainless steel (17-4) in this application. It is difficult to know if these these concerns are valid, there are well respected people arguing on both sides.
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Old 23-07-2014, 02:07   #23
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

5200 on the thread?
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Old 23-07-2014, 02:27   #24
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

Quote:
Originally Posted by MeiWenti View Post
How do you seize a recessed hexagonal (allen-headed) pin like this?....



We can't use a conventional shackle as the protruding head fouls where the anchor comes through the stem-head rather than over a deck level bow roller.
Several possibilities here:

Use (as others have said) one of the higher grades of Lock-tight. You will need to heat the shackle to disassemble.

Centerpunch the head around its periphery to lock it in place.

Peen the threaded end over,or centerpunch it as well.

Any of these will do a good job of securing the pin. If you did all three even worry-warts would be happy!

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Old 23-07-2014, 02:48   #25
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

I don't think you have to go nuts on this stuff. The swivel that is very strong and popular is also a similar head with not way to lock it other than lock tite, seems to work just fine.
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Old 23-07-2014, 18:37   #26
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

Thanks for all the replies.

Noelex - we were looking at a Wichard HR shackle as our chain is 8mm G70, so a standard 8mm shackle is relatively weak compared to the chain. However, Wichard don't do allen-headed HR shackles so we would need to go with the cut and drill solution. However, I wasn't aware of concerns about the 17-7 HR steel - what's the problem with it?

The other option we're considering is a standard 10mm shackle which will just about go through the chain and I'd then probably go ahead and peen the end of the thread over and hope that if I every need to remove it I can file the peening away.
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Old 24-07-2014, 04:52   #27
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

Quote:
Originally Posted by MeiWenti View Post
How do you seize a recessed hexagonal (allen-headed) pin like this?....



We can't use a conventional shackle as the protruding head fouls where the anchor comes through the stem-head rather than over a deck level bow roller.
Locktite
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Old 24-07-2014, 05:38   #28
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

Quote:
Originally Posted by MeiWenti View Post
Noelex - we were looking at a Wichard HR shackle as our chain is 8mm G70, so a standard 8mm shackle is relatively weak compared to the chain. However, Wichard don't do allen-headed HR shackles so we would need to go with the cut and drill solution. However, I wasn't aware of concerns about the 17-7 HR steel - what's the problem with it?
The concern is the lower corrosion resistance. In simple terms crevice corrosion is the greatest problem, but there are other more complex types of corrosion. 17-4 (630) stainless steel is more vulnerable to this type of corrosion than 316.

Anchor shackles can spend some time burried under the substrate in an oxygen low enviroment, or retain mud on the shackle when retrieved.

Rusting of steel is very obvious. In addition the corrosion is reasonably uniform, stainless steel is exactly the opposite pits form and grow at right angles to the surface being attacked. Thus it is easy to miss the development of a problem.

However, I stress I am no expert in metallurgy. It is difficult to gain a perspective if this is a practical problem, but there are reasonable alternatives which do not have these issues.

I also use G7 chain (10mm) and my solution was to use a G8 shackle with the pin modified as shown. My current shackle is a Crosby G-209A (these are a similar, or slightly higher strength than HR SS). There are similar products from a Green Pin.

Another option is to use a titanium shackle. Wichard make some, but not with a flush pin. They are not as strong as the HR option, but I suspect it would be adequate (aim for a bit of overkill to have some allowance for side loading). Titanium does not have any corrosion problems.
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Old 24-07-2014, 05:46   #29
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

I have never had a problem using tie wraps, also use them for marking the rode.
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Old 26-07-2014, 12:32   #30
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Re: Consensus on "How" to Stop the Pin Coming Out of the Anchor Shackle?

I use 1/8" Dyneema which is much easier on the hands when handling the shackle
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