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Originally Posted by UberBlue
I didn't realize SS would do that. Rust that is.
Must of been some freaky SS alloy we had. Exposed to hot sea water without a spot of rust the entire time I was around.
Instead of a polycarb middle, what about something like brass or bronze then?
Just tossing out ideas. I'm sure you and your machinist know what yer doin.
PS, get my mail about the Cascade thread sizes?
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There are specialised variants of SS that are very rust resistant. Some are uber-expensive (as in they cost as much as silver does by weight), are others are just extremely hard to machine.
The issue here is looking for something that is both corrosion resistant,
and is easy to machine, including drilling with 0.022" drill bits,
and is going to EDM fairly easily.
The choice is either metal or plastic. If metal, then it has to be able to be crafted as required. If plastic, it has to be machinable to the level of finery required.