Radial Ball Bearing Bearing Industry Number 6211 Bore Diameter 55 mm Closure Double Shielded For Environment Oily/Greasy Outer Ring Width 21 mm Outside Diameter 100 mm Ring Material Alloy Steel System of Measurement Metric Cage Material Steel ABEC Rating 1 Ball Material Alloy Steel Ball Material Grade AISI 52100 Bore Diameter Tolerance +0/-0.015 mm Dynamic Radial Load Capacity 9 750 lbf Includes Retaining Ring No Lubricant Material Polyrex EM