04-16-2012, 07:34 AM
Why not turn the nose first to say 70mm. This will enable you to hold this in your chuck and face the back and turn the outer diameter to size. Then drill the holes and counter-bore them. Then you could bolt the piece into place and then turn the nose to diameter and thread and then turn the taper. That is how I would go about doing it - but I could be wrong.
Hunting American dentists since 2015.