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Machine Shop and Tool Talk

Swaging Copper Tubing

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Old 08-04-2019, 01:01:12 PM
Pete Spaco Pete Spaco is offline
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Default Swaging Copper Tubing

Recently I needed to extend some copper tubes for the work coils of my small induction heaters. I didn't want to have to buy compression or flare coupling sets. In looking for cheap alternatives, I found the process of simply swaging one end of the two tubes to be joined allowing me to slip one pipe inside the other, so I could solder them together with no fittings at all.
Maybe you guys already know about this, but I didn't.
There are many tools you can buy to do the swaging, but I made my own. Simple, but effective and certainly cheap:

Pete Stanaitis
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Old 08-04-2019, 02:08:02 PM
Vanman Vanman is offline
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Default Re: Swaging Copper Tubing

A while back someone posted your video here, and it was discussed for a while. Don't recall the title of the thread, but I mentioned that I was pretty sure the author was a member here. Good job!

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Old 08-04-2019, 03:21:56 PM
Hubbie Hubbie is offline
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Default Re: Swaging Copper Tubing

Yes they are available in different sizes. You can get them that you use a hammer to drive them in or there's one that looks like a flaring tool. They can be purchased at just about any place that sells refrigeration tools
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Old 08-05-2019, 02:38:55 AM
cobbadog cobbadog is online now
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Default Re: Swaging Copper Tubing

It also helps to 'anneal' the copper first as this softens it and allows it to stretch a bit easier.
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Old 08-05-2019, 03:19:32 AM
M.Canute M.Canute is offline
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Default Re: Swaging Copper Tubing

Many years ago I came across a swaging tool set in Princess Auto in their surplus section and even though I didn't think I would do much tubing swaging, the price was quite reasonable so I bought it and it turned out to be a very good purchase since on one of the very first jobs I used it for, it more than paid for itself. It gets used only occasionally but it's been a godsend for some of the jobs I've done.

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Old 08-05-2019, 11:54:12 PM
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ulgydog56 ulgydog56 is offline
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Default Re: Swaging Copper Tubing

swag tools and block are dirt cheap and do a fine job with a hammer tapped easyyy, done hundreds of them on soft copper before brazing joints (heating&cooling contractor)….

Last edited by ulgydog56; 08-05-2019 at 11:54:55 PM. Reason: corection
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