Cylindrical Roller Bearing Bearing Industry Number 308 Bore Diameter 40 mm Bore Type Cylindrical Cage Material Brass Closure Open Inner Ring Outside Diameter 48 mm Lubricant Material Grease Oil Maximum Speed 8 000 RPM Grease 9 400 RPM Oil Maximum Temperature 120 Degrees C Minimum Temperature -40 Degrees C Number of Rows One Outer Ring Inside Diameter 82 mm Outside Diameter 90 mm Overall Width 23 mm Ring Material Alloy Steel Roller Material Alloy Steel Seal Type Not Applicable