Tede bearings are widely used in the coal industry, mainly in coal mining equipment (such as the rotating parts of shearers and roadheaders), transportation systems (idlers of belt conveyors and bearings of scraper conveyors), as well as in ventilation and hoisting equipment. Their function is to support the rotating shaft, reduce friction loss, and ensure the stable operation of the equipment. They need to adapt to harsh working conditions such as high dust, heavy load, and strong vibration, and have high requirements for wear resistance and corrosion resistance, which is crucial to the production efficiency and safety of coal.