4 Axis CNC Router are equipped with A axis, B axis or C axis as a rotary axis around the X, Y and Z axis, 4 Axis CNC Router are especially designed for cylinder machining works. A real 4 axis CNC router machine means X-Y-Z-C, X-Y-Z-B, X-Y-Z-A, 4 axis are linked, which make the four axis to work at t