Radial Ball Bearing Bearing Industry Number 61910 Bore Diameter 50 mm Closure Double Shielded For Environment Oily/Greasy Outer Ring Width 12 mm Outside Diameter 72 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/-0.012 mm Dynamic Radial Load Capacity 3 500 lbf Includes Retaining Ring No Lubricant Material Polyrex EM