Needle Roller Bearing Bearing Industry Number 509 Bearing Design HK Bore Diameter 5 mm Cage Material Steel Closure Open Full Complement No Lubricant Material Grease Oil Maximum Speed 23 500 RPM Grease 39 000 RPM Oil Maximum Temperature 140 Degrees C Minimum Temperature -30 Degrees C Needle Bearing Type Drawn Cup Needle Roller Bearing Number of Rows One Outside Diameter 9 mm Overall Width 9 mm Ring Material Alloy Steel Roller Material Alloy Steel Seal Type Not Applicable