BALL BEARINGS SIZE CHART Bearings are measured by their inner diameter, outer diameter, and width; the size of a bearing is normally listed as such: ID x OD x W. These measurements are Inches to Millimeters Bearing ChartInches to Millimeters Bearing Chart.  Metric and Inch Camfollower Eccentric Bushes · Metric Camfollowers  Taperlock Bush Shaft Sizes 
What shaft fit do my bearings require? - McGuireWhat shaft fit do my bearings require? SHAFT FIT varies by bearing type and by specific application.  Metric Ball Bearings. Inner Diameter, Low, High.Standard Bearing Sizes - ThomasnetMost ball bearings are metric although there are inch sizes available. Interestingly, the balls themselves are usually inch sizes. Ball bearings are segregated Recommended fits | Basic Bearing KnowledgeTable 9-6 (1) Recommended shaft fits for metric J series tapered roller bearings. Bearing tolerance : class PK, class PN. Load type, Nominal bore diameter d mm