1. Parts with high precision requirements. Because the CNC lathe has good rigidity, high manufacturing accuracy, accurate tool setting, and convenient size compensation, it can process parts with high dimensional accuracy.

2. It is most suitable for many kinds of small and medium batch parts. With the gradual decline in the manufacturing cost of CNC lathes, nowadays, whether it is domestic or foreign, the situation of processing large quantities of parts has also appeared. When processing small batches and single-piece production, it is also possible to shorten the debugging time of the program and the preparation time of the tooling.

3. Parts with complex contour shapes. Any plane curve can be approximated by a straight line or a circular arc. The CNC lathe has circular interpolation function, which can process a variety of parts with complex contours.

4. Parts with small surface roughness values. When the material of the workpiece and the tool, the finishing allowance and the tool angle are certain, the surface roughness depends on the cutting speed and feed rate. Ordinary lathes have a constant speed, and the cutting speeds are different for different diameters. For example, CNC lathes have a constant linear speed cutting function. The same linear speed can be used when turning the end face and the outer circle of different diameters to ensure that the surface roughness value is small and consistent. When processing surfaces with different surface roughness, choose a small feed rate for a surface with a small roughness, and a larger feed rate for a surface with a large roughness. The variability is very good, which is difficult to achieve on ordinary lathes.