Radial Ball Bearing Bearing Industry Number 1623 Bore Diameter 5/8 in Closure Double Shielded For Environment Oily/Greasy Outer Ring Width 0.437 in Outside Diameter 1 3/8 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/-0.0003 in Dynamic Radial Load Capacity 1 525 lbf Includes Retaining Ring No Lubricant Material Polyrex EM