To adopt usual way machining gear with small module and a few teeth, it is easy to emerge gear undercut, thus, it reduces the intensity of teeth and worsens the mesh condition.

• 按常规方式加工小模数少齿数齿轮,容易出现齿轮根切现象,致使齿轮轮齿强度降低、齿轮啮合条件恶化。