I think I would drill a 1/2 hole thru part center. Then take a piece of 1/2 inch threaded rod thru spindle and part and clamp part to spindle with 1/2 inch nuts.
Then turn OD and face and trepan and bore the finish bore to depth. Then turn part around and trepan to cut part from stock. You could leave a little stock and finish Id
After part is free from center piece. If you trepan stop about .01 before you break thru
And break free by hand. The total cost of threaded rod and nuts is about 5 dollars. And you could clamp stock right to front of your chuck jaws.
Jimsehr
