Miniature Ball Bearing Bearing Industry Number R4A Bore Diameter 1/4 in Closure Double Sealed For Environment Oily/Greasy Outer Ring Width 0.281 in Outside Diameter 3/4 in Ring Material Alloy Steel Seal Type Contact System of Measurement Inch ABEC Rating 1 Ball Material Alloy Steel Ball Material Grade AISI 52100 Bore Diameter Tolerance +0/-0.0003 in Cage Type Sealed Dynamic Radial Load Capacity 525 lbf Flange Diameter Not Applicable Flange Thickness Not Applicable