The basic concept of contour teeth is: the tooth height is always consistent along the tooth direction line. Because the tooth height does not change, the root angle, pitch angle and others are equal everywhere. 

The advantage of contour teeth gear:

1) Long service life.

2) Smooth transmission

Qingdao Yehong Machinery Industry&Trade Co.,Ltd purchased contour teeth equipments in 2021, the precision of the gear can be 3-4 grade, which is in the international leading level.