Cylindrical Boller Bearing

During the driving process of the car, the driver can hear a continuous buzzing sound inside the car. If you suspect that the sound is coming from outside, you can open the car window and listen. After raising the car to a certain speed and coasting in neutral, if the buzzing sound still does not change, it can be determined that the front wheel bearings of the car are damaged. If the front wheel bearings are damaged, a lot of heat will be generated. After driving for a period of time, you can touch the wheel hub with your hands and feel that the temperature of the wheel hub will be significantly higher than normal.