Re: 1932 503 Horn Housing

Posted by HH56 On 2019/2/28 18:40:01

If it is 3/4-27 that seems to be a standard plumbing thread and there are some small ready made adapters and nipples that might thread or could be modified. Some seem to be used with faucet aerators and quite a few different shapes and sizes look to be available. If not 3/4 or the hole is smaller perhaps you could go with your nipple idea and thread both sides. Make a smaller thin wall nipple to fit in the hole and hold the pieces rather than trying to weld what looks like it may be pot metal.

Victor Machineryhttps://www.victornet.com/alphabetical.html has special pitch taps and dies in dimensions a bit smaller than 3/4 so you might be able to make a nipple that you could thread into both sides and would not have much affect on the sound. Once a nipple was mechanically holding things together you could worry about cosmetics. As long as the piece is painted some JB Weld might work well to give a more permanent and cosmetic repair. If it is plated then obviously JB Weld would not work.

If you do want to try a solid repair I would go with something like Muggy Weldhttps://www.muggyweld.com/index2.html low temperature rods. They have several formulations that work at about half the melting point of pot metal. I have used their Super Alloy 1 on aluminum and pot metal but you would need to be sure what you are working with to get the correct material. It goes on with a low temp propane torch and seems to hold well but with old pot metal, if it has deteriorated and turned porous there may not be much of anything that will work.

If you have never used the MuggyWeld before by all means watch the videos and practice on scrap to get the temp correct with the flux just turning brown when you apply the rod. Am sure you know that too much heat and it is all over in an instant with pot metal and a hard to find part like that sure isn't something I would want to experiment with.