In the field of industrial equipment, but also refers to the head ends of the shaft axis, the shaft is rotatably supported together with the rotary part and to transmit the motion, torque or bending moments of the mechanical parts, typically a round rod-like metal, can have different diameters of the respective segment , the rotary movement of the machine parts is mounted on the shaft. And the ends of the shaft portion of the shaft is generally called head. The role of the head portion of the car bearing shaft bearing is usually installed, played the role of carrying the shaft equipment operation. During the axis motion, the car bearing shaft head wear, deformation is the most common device case.  

Typically, the wear of the shaft head is used to solve welding, but by the effects of temperature, there will be deformed by the shaft, the foreign polymer composite materials usually used techniques to solve the spindle head wear line, the hardness of the material itself and by bonding cushion the impact force to the bearing shaft head, greatly reducing the emergence of the shaft head wear.

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