Four Row Tapered Roller Bearings NTN consists of two double cones, one double cup, two single cups, one cone spacer and two cup spacers.The TQO type bearing has lubrication holes provided in the cup spacers, the cone spacer, and the double cup. The TQO type bearing is a matched assembly to provide the required end play for the application. Four Row Tapered Roller Bearings NTN can support thrust loads in either direction and has thrust and radial load capabilities greater than the TDI type and TDO type bearings. Four Row Tapered Roller Bearings NTN is normally used as work roll bearings in steel mills.