Zoom to about 5:00 minute mark.
In this video you can see a CNC lathe making some pretty big threads. It has an interesting automatic multi tool holder. There seems to be some high speed tool retraction mechanism which seems air powered or something judging by the clunking noise it's making. I'm wondering if this lathe has been retrofitted from manual to CNC?
I wonder if something like this tool holder could be added to a manual lathe?
https://www.alibaba.com/product-det...spm=a2700.supplier-normal.35.9.5d6b4edeqjYf6T
My home brew CNC mill has turned out pretty good ...