The fixed value method of the turret adopts a tooth type clutch, with a fixed value accuracy of 5 "repeated accuracy of 3". The circular arc tooth type can withstand high cutting forces, and the turret is driven by a high torque oil pressure motor to rotate quickly. The speed is controlled by a cam to ensure a smooth tool change process. Smart computer control allows for bi-directional selection of nearby knives, reducing tool change time. Suitable for processing diameter and deep hole workpieces, such as motor frames, truck brake drums, valves Etc.