Radial Ball Bearing Bearing Industry Number 61903 Bore Diameter 17 mm Closure Double Shielded Outer Ring Width 7 mm Outside Diameter 30 mm Ring Material Alloy Steel System of Measurement Metric Cage Material Steel ABEC Rating 1 Application Radial and Thrust Load Application Bore Diameter Tolerance +0/-10 micron Dynamic Radial Load Capacity Not Available Flange Diameter 32.5 mm Flange Thickness 1.5 mm Includes Retaining Ring No Lubricant Material Grease