Cylindrical Roller Bearing Bearing Industry Number 318 Bore Diameter 90 mm Bore Type Cylindrical Cage Material Brass Closure Open Inner Ring Outside Diameter 103 mm Lubricant Material Grease Oil Maximum Speed 3 300 RPM Grease 3 900 RPM Oil Maximum Temperature 120 Degrees C Minimum Temperature -40 Degrees C Number of Rows One Outer Ring Inside Diameter 177 mm Outside Diameter 190 mm Overall Width 43 mm Ring Material Alloy Steel Roller Material Alloy Steel