The gears always wear out after a period of use. The life of the gears is gradually reduced. The gear life is the working time before the failure of the gear, or the number of revolutions of the gear shaft.
Many types of gear failure, common pitting and broken teeth. Gear wear to what extent be failure, can be supplied, the use of the two sides agreed in the contract clearly defined. For example, through the public normal measurement, the provisions of the length of the value of the public normal line.
