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That link is a guy making a shell style cutter?
I don't get it. As far as I can see, just mechanical masturbation. ×SNIP×
I don't get it. As far as I can see, just mechanical masturbation. Sure, you can do it, but why bother? You have perfectly adequate machine tools to cut those flats on the mill and be done with it in *much* less time. <shrug>Whatever.. just *don't* do like he does and leave the chuck key in the lathe chuck while doing other stuff. It's inviting disaster..
I see the original link has changed. The new link matches the post now. Making machines to make thousands of parts is something a home shop machinist is not trying to do. I am able to make bolts and screws with almost any configuration if I desire. When I desire is when I cannot buy one faster and cheaper. As Chuck points out Safety first and yes there are plenty of ways to make wrench flats quickly in a home shop without that crazy setup.
As a human, just trying to imagine each tool pass makes my head hurt.