MT3 X 100MM Taper Shank Chuck Revolving Bed For 3″ Chucks ~ Used for calibrating or supporting work pieces during processing. Three ball bearings for heavy duty loads and relatively high speed. ~ A is 23.83mm ~ B is 100mm ~ C is 81mm ~ D is 72mm ~ E is 84mm ~ Maximum Load is 1,760 lbs. ~ T.I.R. is < .0002″. ~ Lathe chucks are an option and don’t come with the rotating body.