BEARING UNITIZED FOR HANDLING
A single row tapered roller bearing (B) enables an axle shaft (S) to rotate in an axle housing (H) and further confines the shaft axially with respect to the housing. The bearing includes a cup (32) that is fitted into the housing and a cone (30) that is fitted around a bearing seat (2) on the shaft and also tapered rollers (34) located between raceways (50, 70) on the cup and cone. Radial loads and thrust loads in one axial direction are transferred to the rollers at the raceways. Thrust loads in the other axial direction are transferred to the rollers at an internal rib (72) located on the cup at the large ends of the rollers and at an external rib (80, 102) located on a backing collar (38, 100) at the small ends of the rollers. The backing collar fits over the bearing seat on the shaft with an interference fit and captures the cone on the bearing seat. The bearing also has a cage (36) provided with pockets (90) which receive the rollers, and the cage at its small ends has tabs (92) which project behind a rib on the backing collar and interlock the cage and the collar, so that prior to installation on the shaft the backing collar remains with the cup, cone and rollers. The cup carries a speed sensor (44) which monitors rotation of an excitor ring (42) on the cone.