Radial Ball Bearing Bearing Industry Number R20 Bore Diameter 1 1/4 in Closure Double Shielded For Environment Oily/Greasy Outer Ring Width 0.5 in Outside Diameter 2 1/4 in Ring Material Alloy Steel System of Measurement Inch Cage Material Steel ABEC Rating 1 Ball Material Alloy Steel Ball Material Grade AISI 52100 Bore Diameter Tolerance +0/-0.00045 in Dynamic Radial Load Capacity 3 150 lbf Flange Diameter Not Applicable Flange Thickness Not Applicable Flange Type Non-Flanged