Needle Roller Bearing Bearing Industry Number 1212 Bearing Design HK Bore Diameter 12 mm Cage Material Steel Closure Open Compatible Ring Manufacturer Part Number JR8x12x12 5 Full Complement No Lubricant Material Grease Oil Maximum Speed 18 000 RPM Grease 28 000 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 18 mm Overall Width 12 mm Ring Material Alloy Steel