Tapered Roller Bearing Cup Bore Diameter 3 31/32 in Compatible Cone Grainger Part Number 55PX85 Compatible Cone Manufacturer Part Number 390 390A 392 395A 396 397 399A 399AS Cup Width 0.741 in Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Outside Diameter 4 21/64 in Overall Width 0.741 in Ring Material Alloy Steel System of Measurement Inch Application Forestry Mining Steel Manufacturing Housing Fillet Radius 0.05 in Ring Material Grade 52100