Tapered Roller Bearing Assembly Bearing Industry Number 30318D Bore Diameter 90 mm Bore Type Cylindrical Cage Material Pressed Steel Cone Width 43 mm Cup Width 30 mm Flange Diameter Not Applicable Flange Type Non-Flanged Lubricant Material Not Applicable Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Number of Rows One Outside Diameter 190 mm Overall Width 46.5 mm Ring Material Carbon Steel Roller Material Steel System of Measurement Metric