341 Fourth gear

A gear refers to a mechanical component with teeth on the rim that can continuously mesh and transmit motion and power. The application of gears in transmission has been around for a long time. At the end of the 19th century, the principle of the gear cutting method and the emergence of specialized machine tools and cutting tools that used this principle for gear cutting emerged one after another. With the development of production, the smoothness of gear operation was valued. With the development of science, gears have gradually transformed from metal gears to plastic gears. Because plastic gears have better lubrication and wear resistance. It can reduce noise, reduce costs, and reduce friction. The gear industry mainly consists of three types of enterprises: vehicle gear transmission manufacturing enterprises, industrial gear transmission manufacturing enterprises, and gear specialized equipment manufacturing enterprises.

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341 Fourth gear