Needle Roller Bearing Bearing Industry Number 408 Bearing Design HK Bore Diameter 4 mm Cage Material Steel Closure Open Full Complement No Lubricant Material Grease Oil Maximum Speed 25 000 RPM Grease 39 000 RPM Oil Maximum Temperature 120 Degrees C Minimum Temperature -20 Degrees C Needle Bearing Type Drawn Cup Needle Roller Bearing Number of Rows One Outside Diameter 8 mm Overall Width 8 mm Ring Material Alloy Steel Roller Material Alloy Steel Seal Type Not Applicable