The service life of automobiles is generally designed to be more than 10 years, and the cost of maintenance and repair is relatively high, so the service life of deep - groove ball bearings, thin - wall bearings and miniature bearings used in automobiles is also required to be no less than 10 years. Considering that these bearings bear complex forces during the operation of automobiles, such as the impact and vibration when the car starts, brakes and runs on uneven roads, the bearings need to withstand both impact and relatively large loads, which puts forward very high requirements for the mechanical properties of the bearing materials.

Deep - groove ball bearings are widely used in automobile engines, transmissions and wheel hubs. For example, in the engine, deep - groove ball bearings support the crankshaft and camshaft, ensuring their smooth rotation. The material of the bearing rings is often selected as high - quality bearing steel, and through heat treatment processes such as quenching and tempering, the hardness of the ring matrix can reach an appropriate range, and the raceway surface is quenched to achieve higher hardness, so that it can withstand impact without plastic deformation and increase contact fatigue life, thus meeting the 10 - year service life requirement of automobiles.

Thin - wall bearings are mainly used in automobile suspension systems, steering systems and some precision components of new energy vehicle motors. In the suspension system, thin - wall bearings, with their small friction coefficient and low vibration and noise, ensure the smooth operation of the suspension and improve the comfort and handling of the vehicle. In new energy vehicle motors, thin - wall bearings meet the requirements of high efficiency, low noise and long life of the motor.

Miniature bearings are applied in automobile electronic control systems, such as the motors of electric window lifting systems, car audio systems and seat adjustment systems. In the electric window lifting system, miniature bearings support the motor rotor, making the window lift smoothly and quickly while reducing motor noise. In the safety electronic control system, miniature bearings are also used in some small electric components to ensure their reliable operation and support the safety performance of the vehicle.