Radial Ball Bearing Bearing Industry Number 6310 Bore Diameter 50 mm Closure Double Sealed For Environment Oily/Greasy Outer Ring Width 27 mm Outside Diameter 110 mm Ring Material Alloy Steel Seal Type Contact 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 13 900 lbf Includes Retaining Ring No Lubricant Material Polyrex EM