Mitsui Seiki’s Vertex 550-5X five-axis vertical CNC machining center has a casting design that provides an ultra-rigid machine structure. A unique gear drive system for the A and C rotary axes provides high-speed radial performance and overall drive system stiffness. In addition, the trunnion tilt axis, A, has an ample dual side support rigid construction. The machine’s linear axes move the spindle only, and the motion of the workpiece is by the rotary axes only, features intended to provide improved control of machine dynamics. The unit measures 7 x 11 ft. The X, Y, Z-axes work envelope is 21.6 x 23.6 x 17.7 in. All three move at 1890 in/min. With the A and C rotary and tilt axes, the machine provides a total of five integrated axes of motion for virtually one-setup machining of complex workpieces requiring maximum rigidity and accuracy.