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  Topic Review (Newest First)
02-05-2014 06:53 AM
Re: Chainplate fabrication

Yes the holes for the chainplates are square for the carriage bolts. HOWEVER, unlike the older chainplates that were the squares were punched the ones now are water jet cut. This prevents the problem of having stress failures in the corners.

If you are going to use the carriage bolts to reassemble the plates, you wold need square holes or risk the chance of scratching the plates as you try to hold the bolt head steady.
02-04-2014 06:43 PM
Re: Chainplate fabrication

Originally Posted by Hush34 View Post
I would suggest that anyone who wants it done right contact Thumper at PSC in NC.
Do the new ones still have square holes? That is reason enough to not buy from PSC if so.
02-04-2014 05:31 PM
Re: Chainplate fabrication

I understand that you can get stainless steel from anywhere and have it fabricated to your specifications. I would suggest that anyone who wants it done right contact Thumper at PSC in NC. I ordered a new set for my 34. I received them quickly and they were perfect. I would expect that you might save a few bucks going to some machine shop, but I would suggest that you spend the extra few bucks for each plate and have the experts do the job. Not only will you be keeping the PSC name alive but you will be very satisfied with the end result.
02-02-2014 09:42 AM
Re: Chainplate fabrication

Here is a hint to replace chainplates without removing the rubrail: Once the bolts are removed you can attach a halyard to the chainplate in order to apply upward pressure on the plate so it can be removed easily. I did it and it worked well for me. Good luck!
07-09-2013 06:09 PM
Re: Chainplate fabrication

please post pix. it couod be that you ar eok. my 1976 just got new chainplates due to having sat on santa barbara break wall for a week about 10 yrs ago. only 2 were replaced at this time, 2 were replaced just after the event.

if you are planning on crossing pacific i would say change em out, mebbe.
i would have a rigger look at them.
i would also hesitate to replace until i was in a locale wherein this work is done on a regular basis. mazatlan comes to mind, or th rigger in la cruz de huanacaxtle, in nayarit. or la paz, or san carlos /guaymas.....
or do it in panama or costa rica. you have choices, as they didnt fail while in transit.

mine were crafted of 304 ss in san diego at a machine shop across street from downwind marine. i replaced em at the cop dock with friends.
07-09-2013 05:18 PM
Re: Chainplate fabrication

Here is a story of a titanium chainplate failure.

A bit about the dismasting... - Odda Sea - Life Aboard An Allied Princess Sailing Yacht

Bill Murdoch
1988 PSC 34
Irish Eyes
04-10-2013 06:42 PM
Re: Chainplate fabrication

Original stainless manufacturer in CA did mine while PC was "insolvent". He was great. Charged about $800 bucks for the whole lot. An Annapolis crew wanted $3,000. Unsure if he'd work with you directly but perhaps an email to Thumper at the factory would help. I may be able to dig up his name...its been a few years. Let me know.
01-23-2013 03:32 AM
Re: Chainplate fabrication


After stainless chainplates are fabricated they really need to be electropolished to maximize corrosion resistance. You could certainly skip it, but then you start trading corrosion resistance for price pretty quickly.
01-23-2013 02:14 AM
Re: Chainplate fabrication

Originally Posted by wsmurdoch View Post
For so meting as simple as the chainplates you should be able to judge the shop and the workers for yourself.
Yeah....thats what I thought when I took my forestay chain plate to Svendson's. A major boat yard in the SF Bay Area (not the Third world!) with a big machine shop. They couldn't even get the holes in the right place or re-assemble everything correctly. God knows if they used the right steel!
01-22-2013 09:36 PM
Re: Chainplate fabrication

For someting as simple as the chainplates you should be able to judge the shop and the workers for yourself. If you are worried about the steel, you might want to see the plate before the steel is cut and polished. The plate that the chainplates are fabricated from should be marked with the alloy, the manufacturer, and the heat number. The shop should have a "mill sheet" (analysis) for the heat (batch of metal). If the shop does not have it, the manufacturer should be able to fax it to you. The mill itself should be ISO 9000 certified which means that a competent third party (usually British Standards Institute) has examined their quality control systems and they can be trusted.

Bill Murdoch
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