pe reivers
Thanks for you response.

T.I.R = Total indicated runout as was checked on the outside
diameter of the cylinder.

The mandrel is in the photo below.
The mandrel diameter was turned to allow one wrap or mylar tape
around the area where the inside of the cylinder fits for protection
I should have split the mandrel for adjustment.
The taper is on the "x" axis. (left to right as pictured.)
A four jaw chuck was used to hold and the job.