This is a Spline shaft. The material is 40cr . All of the shaft's hardness is 25~28HRC,blackening the surface to prevent rust

This is a Spline shaft.The material is 40cr .All of the shaft's  hardness is 25~28HRC,blackening the surface to prevent rust,

Structure: in the axis of the appearance of a longitudinal keyway, set in the rotating piece has a corresponding keyway, can be maintained with the shaft rotates synchronously. During rotation of the at the same time, some still can be in the shaft for longitudinal sliding, such as transmission shift gear.

Role: a peace is a mechanical transmission, key, Woodruff keys, oblique key role, is to transfer mechanical torque,

We can do all of this kind shafts.

Spline shaft