I am trying to figure out exactly what lathe tool I need to face internally on the end of a bar. The easiest way I know how to describe it without drawing a blue print is if a freeze plug was on the end of a piece of round bar stock or if ya took a 1½" round bar, chucked it up in the lathe and bored a flat bottom hole in the face of it using a 1¼" end mill. Is this even possible?