The axle of the car is connected to two wheels. It is very simple to look at the product in appearance, but their role is very important. They must protect the torque of the wheel under different conditions and also bear the gravity of the car itself. . In the past, some data showed that they would not easily bend or break under normal circumstances. If the damage could not be repaired, only the direct replacement could directly affect the use of the factors due to improper operation or It is caused by overloaded driving. The weight of the car body plus the weight of the cargo will directly reach his tolerance limit, which will easily cause damage. In addition, it is very uniform in the process of use, afraid of water or dust. Therefore, we must pay attention to the protective dust cover of the semi-axle. If it is found that the protective dust cover has been damaged, it should be replaced in time to avoid directly affecting the use of the semi-axle.