Radial Ball Bearing, Bearing Industry Number 61906, Bore Diameter 30 mm, Closure Double Shielded, For Environment Oily/Greasy, Outer Ring Width 9 mm, Outside Diameter 47 mm, Ring Material Alloy Steel, System of Measurement Metric, Cage Material Steel, ABEC Rating 1, Ball Material Alloy Steel, Ball Material Grade AISI 52100, Bore Diameter Tolerance +0/-0.1 mm, Dynamic Radial Load Capacity 1,630 lbf, Includes Retaining Ring No, Lubricant Material Polyrex EM