Radial Ball Bearing Bearing Industry Number R8 Bore Diameter 1/2 in Closure Double Shielded For Environment Oily/Greasy Outer Ring Width 0.312 in Outside Diameter 1 1/8 in Ring Material Stainless Steel System of Measurement Inch Cage Material Stainless Steel ABEC Rating 1 Ball Material Alloy Steel Ball Material Grade AISI 52100 Bore Diameter Tolerance +0/-0.0003 in Cage Material Grade 304 Dynamic Radial Load Capacity 4 900 lbf Flange Diameter Not Applicable