Wagon bearings operate under difficult conditions and are among the fastest-wearing parts of a car. The performance of the bearing mainly depends on the following factors: the workmanship, reinforcement, babbitt layer of the bearing seat; the geometry and cleanliness of the journal surface; the correctness of the assembly of the axle box and the car bogie; the uniform loading of the truck; the spring suspension The stiffness; path state.
The weakest point of the bearing is the mechanical connection of the reinforcement to the housing and the babbitt metal to the reinforcement using conical grooves and grooves.
The most common bearing damages in operation include wear, chipping and cracking of the housing, loosening of reinforcement and gap formation between the reinforcement and the housing, cracks, chipping, hysteresis behind the housing and extrusion of the babbitt layer.