Spiral bevel gear spiral bevel gear that is commonly used in sports and the power transmission between two intersecting axes. Bevel gear teeth distributed on the surface of a cone, the tooth gradually decreases from the large end of the small end.

Spiral bevel gear before nitriding stress relieving effect:
　　Shafts stress before nitriding whether completely eliminate, the impact on the amount of distortion nitriding great. Stress relief tempering temperature quenching temperature is generally higher than when not. Due to large workpiece machining stress during machining, if the tempering temperature is selected properly, the organization does not affect the basic premise of raising the temperature as much as possible patenting and holding a certain time, when machining a workpiece will stress released and converted to distortion in the plastic state, then the stress will substantially eliminated.