patr said:I have 25 years as a Machinist and several degree's collecting dust. If you can not measure a tolerance you cannot claim it. .0002" is a tall claim and most shops don't have the equipment to measure it, I have worked in 2 that can lake the claim. If you have a temp controlled room and a Jig Grinder you can talk, if you are in your garage with a Grizzly Lathe pray for a thou at most....
I have an Angelinni tool room lathe from Italy that is tight as the best, I would not claim anything better than a couple thou perpendicularity or concentricity.