Radial Ball Bearing Bearing Industry Number 6311 Bore Diameter 55 mm Closure Open Outer Ring Width 29 mm Outside Diameter 120 mm Ring Material Alloy Steel System of Measurement Metric Cage Material Steel ABEC Rating 1 Ball Material Alloy Steel Bore Diameter Tolerance +0/-0.015 mm Cage Type Pressed Dynamic Radial Load Capacity 79 500 N Fillet Radius 2 mm Finish Chrome Plated Includes Retaining Ring No ISO Rating Class 0 Lubricant Material Not Available