This is awesome. I had no idea that it was this simple and didn't require super special tools.
This is awesome. I had no idea that it was this simple and didn't require super special tools.
It's an art form to get right! You need the proper amount of heat but not to much or the base shaft bends and the powder gets grainy.... best to make a new shaft then repair but sometimes theres no options.
In reply to 44Dwarf:
We would do this all the time. Ideal option is a new shaft, but financially that doesnt make sense on specialized equipment. Heat control is critically important, not only for the integrity of the shaft, but also for the repaired surface.
I've become somewhat addicted to Abom79's videos from his machine shop. 
I work in a power plant and have mostly seen it used to repair shafts on large electric motors where a spun bearing damaged the shaft. For lip-seal grooves, we'll often use repair sleeves just like those used on engines.
stuart in mn wrote: I've become somewhat addicted to Abom79's videos from his machine shop.
Check out Keith Fenner and This Old Tony if you need more.
So for you experts- what's the more "modern" version of this. He mentioned that he uses a old system with the torch and the gravity fed powder metal.
It's extremely popular in mold-making shops. No sense scrapping a mold with a minor imperfection. Rip out the spray welder and repair it!
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