Radial Ball Bearing Bearing Industry Number 6306 Bore Diameter 30 mm Closure Double Sealed Outer Ring Width 19 mm Outside Diameter 72 mm Ring Material Alloy Steel Seal Type Non-Contact System of Measurement Metric Cage Material Alloy Steel ABEC Rating 1 Application Radial and Thrust Load Application Bore Diameter Tolerance +0/-10 micron Dynamic Radial Load Capacity Not Available Includes Retaining Ring No Lubricant Material Grease