Micro bearings are small precision rolling bearings with an outer diameter of less than 30 millimeters, characterized by high speed, low friction, and long life. They are mainly used in equipment that requires small size and high precision, such as micro motors, medical devices (such as dental drills), precision instruments (such as optical encoders), consumer electronics (such as drones, hard drives), and industrial robots. Its core function is to reduce friction, support rotating components, and ensure efficient and stable operation of the equipment.