Years of focusWestern slow walkEtc.

Rack module: Rack is a special gear whose teeth are distributed on the bar body, which can be divided into straight teeth and helical teeth. Rack modulus is the basic parameter of rack selection. It is the distance between two teeth, that is, the ratio of the tooth distance p between the tooth profile on the same side of two adjacent gear teeth to PI. The commonly used modules are 1.5/2 and 3/4/5/6, which can be used for 1-15 modules.