Tapered Roller Bearing Cone Bearing Industry Number 64450 Bore Diameter 4 1/2 in Bore Type Cylindrical Cage Material Pressed Steel Compatible Cup Manufacturer Part Number 64700 64708 Cone Width 1.625 in Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Number of Rows One Outside Diameter 6.772 in Ring Material Alloy Steel Roller Material Alloy Steel System of Measurement Inch Dynamic Load Capacity 255 kN Inside Diameter 4.5 in Ring Material Grade 52100