Tapered Roller Bearing Cone Bearing Industry Number 643 Bore Diameter 2 3/4 in Bore Type Tapered Cage Material Chrome Steel Compatible Cup Manufacturer Part Number 632 632B 633 Cone Width 1.625 in Lubricant Material Not Applicable Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Number of Rows One Outside Diameter 4.92 in Ring Material Carbon Steel Roller Material Carbon Steel System of Measurement Inch Dynamic Load Capacity 48 000 lbf