A variety of types and specifications of hydraulic steering axis precision cavity is a complex multi-step precision cavity, require high dimensional accuracy, high position accuracy requirements. The methods are difficult to machine processing, is a high-precision molds, extrusion products to meet the accuracy requirements, to achieve stable production in large quantities.

EPS power steering input and output shafts precision cavity also uses a compression molding, and part of the carbon steel shaft deformation strengthening implementation processes or quenched after extrusion, the torsion bar press-fit parts of the strength of the product design requirements, without then heat-treated product as a whole.