Radial Ball Bearing, Bearing Industry Number R8, Bore Diameter 1/2 in, Closure Double Shielded, For Environment Oily/Greasy, Outer Ring Width 0.313 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