In the long history of human invention and creation, bearings seem ordinary, but they play a very critical role and can even be regarded as one of the greatest inventions.

In principle, the core of bearings is to change sliding friction into rolling friction, which greatly reduces the resistance of mechanical operation. This simple but ingenious design has improved the efficiency of machinery. Imagine that without bearings, there will be heavy sliding friction between the wheels and the axles, and it will be difficult for the vehicle to move forward. With bearings, the wheels can rotate lightly and smoothly, and the speed and efficiency of vehicles have achieved a leap. The application range of bearings is extremely wide, covering almost all industrial fields. In the manufacturing industry, the operation of various machine tools such as lathes and milling machines relies on bearings to ensure precision and efficient production. In the automotive industry, key components such as engines, gearboxes, and wheel hubs cannot do without bearings, and their performance is directly related to the quality and service life of the car. The requirements for bearings in the aerospace field are even more stringent. The engines, landing gears and navigation systems of aircraft require high-precision and high-durability bearings to ensure the safety and stability of flight. In the home appliance industry, refrigerators, washing machines, air conditioners and other equipment run smoothly and reduce noise due to bearings. In the energy industry, the bearings of wind turbines need to withstand huge loads and operate for a long time, supporting the sustainable development of renewable energy. From a historical development perspective, the emergence of bearings has promoted the progress of human civilization. In ancient Egypt, people used logs as sleepers to transport heavy objects, which was an early application of the bearing principle. Over time, bearings have continued to evolve, from simple wooden structures to today's precision components that integrate cutting-edge technology. High-end bearing manufacturing involves a series of complex problems such as materials, lubrication, and manufacturing processes, as well as multidisciplinary research, and has become an important indicator of a country's industrial level.

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