The workpiece can complete the pentahedron processing in one clamping with the characteristic of high efficiency and precision for 5 axis linkage machining center. If equipped with a five-axis linkage high-end CNC system, it also can process the complex spatial curved surfaces with high precision, and is more suitable for the processing of modern molds such as auto parts and aircraft structural parts. There are two ways of rotary axis for the vertical five-axis machining center. One is the table rotary axis. The table set on the bed can rotate around the X axis, which is defined as the A axis. The general working range of A axis is +30 degrees to- 120 degrees. Another rotary table in the middle of worktable, which rotates around the Z axis at the position shown in the figure, is defined as C axis,  it is 360 degree rotation.

In this way, with the combination of A axis and X axis, the workpiece fixed on the table can be processed by the vertical chief axis except the bottom surface. The minimum division value of the A-axis and C-axis is generally 0.001 degrees, so that the workpiece can be subdivided into any angle, inclined surface and inclined holes can be processed. If the A-axis and C-axis are linked with the three linear XYZ axes, then, the complex spatial curved surfaces can be processed. Of course, this requires high-end CNC systems, servo systems and software support. The advantage of this arrangement is that the structure of the chief axis is simple, the rigidity of chief axis is very good but with low manufacturing cost. However, the general worktable can not be designed too big, as the load-bearing is small, especially when the rotation of A axis is larger than or equal to 90 degrees, it will bring great load to the worktable during workpiece cutting.