Originally Posted by
jwatte
Fascinating!
I line up my ITTP with a mark I've made on the spindle, but I do it by eye, so I'm sure I'm off by a few degrees.
That being said, I believe I'm getting 1-thou or better out of the ITTP, and tool deflection and other parts of my setup contribute likely just as much (or more) than the probe.
After all, I mainly do structural parts, where, if a screw hole is off by a thou or two, that's not a problem, and if a bearing race is slightly undersize, well, aluminum is softer than the bearing steel, and I have a swing press ...