Tapered Roller Bearing Cone Bearing Industry Number 39580 Bore Diameter 2 1/4 in Bore Type Tapered Cage Material Chrome Steel Compatible Cup Manufacturer Part Number 39520 39521 Cone Width 1.187 in Lubricant Material Not Applicable Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Number of Rows One Outside Diameter 4.21 in Ring Material Carbon Steel Roller Material Carbon Steel System of Measurement Inch Dynamic Load Capacity 34 500 lbf