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Old 12-10-2016, 17:50   #31
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Re: Where on Earth do you find these parts?!

Wow.... nice job on the part Offshore 1960!
That's very similar to what Jason's dad wants to do. I think that may be ticket. We were hoping to have a piece in our hands before we get there instead of trying to put it together while in an area that we aren't familiar with the shops and reputations, etc. I suppose we may not have that option but this is great info. Much obliged!


DeepFrz- it's actually a Roger Simpson catamaran. I think he may have been English but operated out of Australia. This particular boat was built in the UK.


Thanks for the tips on galling probs too!
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Old 12-10-2016, 21:39   #32
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Re: Where on Earth do you find these parts?!

If you decide to try t he casting route, remember that the pattern must be a bit larger in all dimensions than the finished casting will be. This is due to the shrinkage in the metal as it cools from the liquid state to room temp solid. this means that you can not simply use an existing part as a pattern. A nuisance that mother nature has thrown up for us!

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Old 13-10-2016, 04:41   #33
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Re: Where on Earth do you find these parts?!

Well, it seems options abound.

Good to get some clarifications on size and application.

While working with molten metal and sand casting certainly has its' attractions, (at least to me), it seems that from an efficiency point of view machining from a solid block of bronze might win out in the end.

For instance, a piece of C95400 aluminum bronze, 2 1/2" x 2" x 12" (enough for 2 gudgeons), is 112.64, plus shipping, from Bravo Bronze,

C95400 Flat Bar 2-1/2" Thick x 12" Wide - C95400 Aluminum Bronze - Shop By Alloy - Shop Alloys



I'm not sure this is the best alloy for the application, but I'm sure a call to them would steer you in the right direction.

Regarding machinability, in my limited experience with bronze, it seems that bronze was a little easier to work with than stainless, though that is probably a function of the alloy one's working with.
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Old 13-10-2016, 05:49   #34
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Re: Where on Earth do you find these parts?!

One more idea to consider - design the piece and have it 3D printed, test to ensure fit, send 3D printed piece for duplication in bronze.
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Old 13-10-2016, 05:52   #35
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Re: Where on Earth do you find these parts?!

Thanks Jim!
So when Jason looked for SS last time he'd looked at the wrong piece and therefore the price was way off. We'd also thought of bronze but didn't look into it enough. Seems like the right material. The link to the bronze is perfect. Thank you. Originally we talked about fabricating something to get us back home and then machining a piece after we got the boat home. I think we may just try and machine it off our measurements at our friends shop and get it as perfect as we can to bring it down to the boat with us.


Everyone has really been so helpful.
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