What are the symptoms of a bad car bearing?

[OVivienne]

When a car bearing is damaged, it will produce loud noises while driving, emitting a humming sound, and generate excessive heat that can be hot to the touch. The main function of a wheel hub bearing is to bear the load and provide precise guidance for the rotation of the wheel hub. It bears both axial and radial loads, making it a very important component. Traditional automotive wheel bearings consist of two sets of tapered roller bearings or ball bearings combined. The installation, greasing, sealing, and adjustment of bearing clearance are all performed on the automobile production line. The traditional bearing structure makes it difficult to assemble in automobile factories, with high costs and poor reliability. Additionally, when the car is serviced at maintenance points, the bearings need to be cleaned, greased, and adjusted.