Common damage state and cause analysis of head bowl bearing

The headstock bearing is a part that is used in many vehicles. As a part of the operation class, the loss is very large at many times. In this case, it is very important to understand how to avoid the loss. This issue will briefly share the damage methods and related reasons.

Damage condition: When the products wholesale by the manufacturer of the headstock bearing rotate under the load, the inner race, the outer raceway surface or the rotating surface show fish-like peeling due to rotation fatigue.

Cause: The load is too large. Foreign matter invasion and water ingress due to poor torque load during installation. Poor lubrication, improper lubricant, improper bearing clearance. Poor precision of the bearing box, uneven rigidity of the bearing box, large deflection of the shaft, rust, corrosion points, scratches and imprinting.

Countermeasures: check the load size and re-study the bearing used to improve the installation steps, improve the sealing device and prevent rust during shutdown. Use lubricant with proper viscosity and improve lubrication method. Check the accuracy of the shaft and bearing housing. Check the side clearance.

Damage condition: The customized effect of the cartridge type headstock bearing shows a dark surface with slight wear. The dark surface has several small gaps from the surface to the inside, ranging from 5-10m deep, and has a small fall off in a scale.

Cause: Improper lubricant. Foreign matter enters the lubricant. Poor lubricant causes rough surface. The surface gloss of the matched rotating parts is not good.

Countermeasures: select lubricant to improve the sealing device and improve the surface gloss of the matched rotating parts.

Damage condition: The so-called jamming damage commonly seen in the customization of motorcycle head bowl bearings is the surface damage caused by the partial minor burns and carding on the sliding surface. Strip scar on the angle of guide rail surface and rotating surface circle. The pendulum scar on the roller end face is close to the snap on the ring surface of the roller end face.

Cause: too large load and preload. Poor lubrication. Foreign matter bite. Inclination and shaft deflection outside the inner ring. The accuracy of shaft and bearing box is poor.

Countermeasures: check the load size. Pre-pressure as much as possible. Improve lubricants and lubrication methods. Check the accuracy of shaft and bearing box.

Damage condition: The so-called crack refers to a small part of the crack due to the impact or too large load on the part of the rib or roller angle of the raceway wheel.