Involute spline shaft is a spline, and the transmission torque of the parts generally through the key and spline shaft connection.

Rectangular spline shaft and involute spline shaft are commonly used. Involute spline shaft applications become more and more extensive. This is because the involute spline shaft with rectangular spline has many advantages, such as teeth, tooth, tooth root thickness, strong bearing capacity, easy installation, high precision. The spline shaft diameter is large in the same shape and size, which is beneficial to increase the stiffness of the shaft. The involute spline shaft is convenient to adopt the process of cold rolling, cold and cold extrusion without cutting chip processing technology, high production efficiency, high precision, and saving material.