Spherical Roller Bearing, Bearing Industry Number 21306, Bore Diameter 30 mm, Bore Type Cylindrical, Cage Material Steel, Closure Open, Lubricant Material Grease, Maximum Speed 10,000 RPM Grease, Maximum Temperature 390 Degrees F, Minimum Temperature 0 Degrees F, Outside Diameter 72 mm, Overall Width 19 mm, Ring Material Alloy Steel, Roller Material Alloy Steel, Seal Type Not Applicable, System of Measurement Metric, Application Vibratory Applications, Wind Energy