The use of CNC lathe power turret for a long time will reduce the coaxiality and horn conditions, which will immediately affect the production processing accuracy and processing efficiency. Practical experience has proved that the following adjustments can improve the accuracy and processing efficiency, the way is simple and easy to use, the actual effect is significant, may wish to try. Taking the positive claw servo power cutter tower as an example, the CNC lathe is started to mill part of the inner hole of the claw. Then a ring is clamped with the method of internal support, and the CNC lathe is started to mill the inner round part and the inner hole of the claw. Obviously, that can significantly enhance the coaxiality of the power cutter tower and the lathe spindle after production and processing and remove the horn condition, obtain higher accuracy, and achieve the purpose of adjustment.