Cylindrical Roller Bearing Bearing Industry Number 204 Bore Diameter 20 mm Bore Type Cylindrical Cage Material Thermoplastic Closure Open Lubricant Material Grease Oil Maximum Speed 22 000 RPM Maximum Temperature 120 Degrees C Minimum Temperature -30 Degrees C Number of Rows One Outer Ring Inside Diameter 38.8 mm Outside Diameter 47 mm Overall Width 14 mm Ring Material Alloy Steel Roller Material Alloy Steel Seal Type Not Applicable Split Bearing Yes