Friction Welding Job on the lathe

In this video, a broken shaft is friction welded to a threaded stud on the lathe.

The end result is a serviceable part and works well however there are a few things that we're learnt from this video and in future videos, we're going to try to do other friction welding videos. To help us develop the skill of friction welding on the lathe.

Currently, friction welding technology is seeing its place and welling together rocket engines by stir welling. To my understanding, they're using this technology because it does not add a 3rd party metal to the mix; in the end, we'll create a stronger weld free of flaws. No, I know this is a beaver table saw shaft, not a rocket engine but we have to start learning somewhere

check out the discussion

[calebburnett]

Great work! Glad to see it work. Look forward to the next one.

[dannywilsher]

Looked like it turned out great. I tried that once, never could get it to work right until I machined a pin on one end and a hole to fit the pin on the other piece of rod. It kept it lined up and it worked out perfect.

[Jims-Workshop]

This was interesting, Couldn't help but notice the threads are a different pitch between old and new. Do you think it would be feasible to do friction welding on a lighter duty lathe like a Southbend 9 or 10K or an Atlas/Craftsman?