I made this mandrel a few years ago while making some threaded spacers for another project. I just dug it out to use it while I was making an adapter plate for the steering wheel in my van project.
The small pilot is sized .422 for a 1/2-13 tap drill. Drill the pilot and bolt on the mandrel and the part is ready to turn.
I made the adapter out of a chunk of 1/2" plate. I knocked the corners off in the H/V bandsaw.
Ready to chuck up.
Continued in next post...