Radial Ball Bearing, Bearing Industry Number R20, Bore Diameter 1 1/4 in, Closure Double Sealed, For Environment Oily/Greasy, Outer Ring Width 0.5 in, Outside Diameter 2 1/4 in, Ring Material Alloy Steel, Seal Type Contact, 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