Radial Ball Bearing, Bearing Industry Number 6309, Bore Diameter 45 mm, Closure Open, Outer Ring Width 25 mm, Outside Diameter 100 mm, Ring Material Alloy Steel, System of Measurement Metric, Cage Material Steel, ABEC Rating 1, Ball Material Alloy Steel, Bore Diameter Tolerance +0/-0.007 mm, Dynamic Radial Load Capacity 55.3 kN, Fillet Radius 1.5 mm, Includes Retaining Ring No, Lubricant Material MT47 Grease