Tapered Roller Bearing Cone Bearing Industry Number 1779 Bore Diameter 59/64 in Bore Type Cylindrical Cage Material Pressed Steel Compatible Cup Grainger Part Number 55PX18 Compatible Cup Manufacturer Part Number 1729 Cone Width 0.781 in Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Number of Rows One Outside Diameter 2.008 in Ring Material Alloy Steel Roller Material Alloy Steel System of Measurement Inch Bore Diameter Tolerance +0 to 0.025 mm