The bearing is used to support the Propeller shaft which connects the Gear Box to Rear Axle of the Vehicle. Center bearing supports carry the load of the drive shaft while allowing axial and radial deflection during start-up and braking.

Bearings
KING PIN BEARINGS
They are available in two types: caged and cageless (Full Complement Type), and have a high capacity for taking even high shock loads. They have two tapered thrust races, rollers, a cage, and an outer retainer that holds the components.