Radial Ball Bearing Bearing Industry Number 6311 Bore Diameter 55 mm Closure Double Sealed Outer Ring Width 29 mm Outside Diameter 120 mm Ring Material Stainless Steel Seal Type Contact System of Measurement Metric Cage Material Stainless Steel ABEC Rating 1 Ball Material Stainless Steel Bore Diameter Tolerance +0/-0.015 mm Dynamic Radial Load Capacity 16 100 lbf Flange Diameter Not Applicable Flange Thickness Not Applicable Flange Type Non-Flanged Includes Retaining Ring No