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Fri, April 19 2024, 20:23 [ Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, 2, 3, [4], 5, 6, 7, 8, 9 ]

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Date Posted: - Saturday - 04/ 3/10 - 9:33pm
Author: Paul M31 #106
Subject: I have seen the topic brought up -
In reply to: scott aumuller m31 BOOJUM 's message, "chainplates" on - Saturday - 04/ 3/10 - 6:06pm

I believe there is a discussion and template for replacement plates in the projects section...

I am not sure if you should be overly concerned, unless there's reason to be perhaps from a visual inspection.. If they look good but you still have a concen, you could clean them and spray with fluorescant dye penetrant - a blacklight would show if there were any microcracks or compromises from (caustic) embrittlement - the only cause I can think of why they would fail over time...

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Replies:

[> [> chainplates -- scott aumuller m31 BOOJUM, - Sunday - 04/ 4/10 - 6:55am

Thanks mine look good and a rigging survey did not show cause for alarm but I was just wondering if any one had had a problem scott


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[> [> Chainplates -- Bruce, - Thursday - 04/ 8/10 - 3:01pm

The Japanese built Mariner chainplates have been known to fail in the section concealed within the plywood just at the point where they pass through the deck. They cannot be inspected unless you remove them, or in the least, unbolt them and slide them up far enough to inspect the concealed portions. I posted a photograph in an earlier post of one of my old chainplates whetre that particular section was rusty and pitted with some material already missing, and about to fail. That promped me to replace all of the chainplates with thicker beefier ones. I have the dxf pattern files for a water jet cutter if you're interested in fabricating new chainplates Let me know if you want photographs. I can email them.


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[> [> [> replacing chainplates -- Kathy M32#3 Shadow, - Friday - 04/ 9/10 - 12:59pm

Hi Bruce,
Did you put the chainplates on the exterior of the hull or through the deck? Inspection would be easier with exterior chainplates.
So far there was significant deterioration on the lower main forward port chainplate. The nuts an bolts attaching the plate to the hull were corroding and the chainplate itself had a visible hair line crack. The mizzen lower showed corrosion under a hand held microscope. So that decided me to replace all the chainplates.
Yours truly, Kathy


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[> [> [> [> chainplates -- Doug Wilson, - Saturday - 04/10/10 - 3:11pm

Don't forget to check the bobstay tang as well, I replaced mine in November, the holes for the bolts were bigger than the bolt heads.
Only cost $38.00 US and was ready less than 24 hours later. Built with heavier stock as well.
Gotta love Mexico!


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