The gear life is the working time before the gear failure, or the number of revolutions (circles) of the gear shaft. There are many kinds of gear failure, including pitting and broken teeth.

Gears play an important role in many machines, so how to improve their service life in the process of use?

Gears are wearing parts. 1. The surface finish should reduce the friction coefficient, 2. The surface hardness should be improved.

The selection of raw materials should be reasonable. First, it should be passed in the quenching and tempering process. According to the change rule of the sliding coefficient of the two wheels during gear transmission, the sliding coefficient of the cast steel bevel gear root is greater than the sliding coefficient of the tooth top, while the sliding coefficient of the pinion root is greater than the sliding coefficient of the big gear root. In order to make the tooth root wear of large and small reduction gears close, the pinion shall be made of hard material. In the heat treatment, the hardness is dozens of HB higher than that of the big gear. The small gear can also be high-frequency induction heating and surface quenching along the tooth groove to increase its wear resistance.