Radial Ball Bearing Bearing Industry Number 6309 Bore Diameter 45 mm Closure Double Shielded Outer Ring Width 25 mm Outside Diameter 100 mm Ring Material Alloy Steel 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