Tapered Roller Bearing Cone Bearing Industry Number 39578 Bore Diameter 2 1/8 in Bore Type Tapered Cage Material Chrome Steel Compatible Cup Manufacturer Part Number 39520 39521 Cone Width 1.187 in For Cup Width 0.937 in Lubricant Material Not Applicable Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Number of Rows One Outside Diameter 3.98 in Ring Material Carbon Steel Roller Material Carbon Steel System of Measurement Inch Dynamic Load Capacity 34 500 lbf