Needle Roller Bearing Bearing Industry Number 4520 Bearing Design HK Bore Diameter 45 mm Cage Material Steel Closure Open Compatible Ring Grainger Part Number 4ZZZ4 Compatible Ring Manufacturer Part Number IR40X45X20-XL LR40X45X20 5 Full Complement No Lubricant Material Grease Oil Maximum Speed 3 550 RPM Grease 5 900 RPM Oil Maximum Temperature 140 Degrees C Minimum Temperature -30 Degrees C Needle Bearing Type Drawn Cup Needle Roller Bearing Number of Rows One