Needle roller bearings are crucial in the application of the power industry. In the generator, needle roller bearings can support the rotor shaft, ensuring its stable rotation, reducing friction losses, and improving power generation efficiency; In electric motors, it can ensure smooth operation, reduce vibration and noise. The fan motor of the transformer cooling system also uses needle roller bearings to assist the fan in efficient operation and achieve good heat dissipation. In addition, in the operating mechanisms of power transmission equipment such as high-voltage switches, isolation switches, etc., needle roller bearings help to facilitate the flexible movement of mechanical components and ensure reliable opening and closing of the equipment. In summary, needle roller bearings provide strong support for the stable operation of power systems due to their high load-bearing capacity and low friction characteristics.