There are various reasons for the damage of automotive bearings, mainly including the following aspects:

Improper assembly: If the bearing is too tight or too loose during installation, it may cause damage. The correct installation method and appropriate torque are key to ensuring the normal operation of bearings.

Insufficient lubrication: Bearings require sufficient lubrication during operation to reduce friction and wear. If the wheel oil seal or the outer end cover of the shaft head is damaged, causing lubricating grease to be thrown out from the damaged area, or due to aging or contamination of the grease, the bearing may lack lubrication, resulting in overheating, wear, and damage.

Brake failure: When the vehicle is in motion, if the brake fails, such as excessive heat generated by friction between the brake shoes and brake drums, or if the brake does not rise, it may cause the bearings to overheat and be damaged due to lack of lubrication.

Oil impurities: Impurities mixed into the oil can cause internal wear and tear of the bearing, leading to damage.

Bearing clearance issue: Improper setting of clearance during assembly of bearings at the factory, whether too small or too large, can affect the normal operation of the bearings.

External factors: Bearing contact with pollutants such as water, acid, paint, etc. can cause corrosion; The presence of debris, dust, and other foreign objects in the bearing seat hole can also affect the normal operation of the bearing; Eccentric installation of sealing rings can cause friction; Bearing subjected to additional loads such as axial clamping too tight or multiple fixed end bearings on the shaft can also increase the risk of damage.

Thermal elongation problem: If the thermal elongation of the shaft exceeds the normal range, it will cause the bearing to bear additional axial loads; Excessive shoulder size can also cause friction when in contact with the bearing seal.

Other factors include corrosion of bearing alloys, mechanical damage, fatigue pitting, pitting, etc. These are usually caused by improper selection of lubricating oil, engine overload, and structural problems with oil grooves and holes.

In order to prevent damage to car bearings, regular inspection and replacement of lubricating grease should be carried out to ensure the normal operation of the brake, avoid oil impurities, pay attention to the installation and clearance setting of the bearings, and avoid the influence of external factors on the bearings. In addition, maintaining the accuracy of the shaft and bearing housing, avoiding foreign object intrusion, and inspecting and maintaining the design and usage conditions around the bearings are also very important.