Glossary of terms used on this siteThere are 38 entries in this glossary.
Having or marked by parts radiating from a common center. Moving or directed along a radius.
Points chosen on a surface or in a bore that represent the starting point (reference) for which all other points on the surface or in a bore will be compared. Also referred to as a datum. For bore, spindle and rotating shaft applications 2 reference points are needed to establish a datum. For surfaces, 3 reference points are needed to establish a datum.