CNC machining has the following advantages:

① The number of tooling is greatly reduced, complex tooling is needed to process parts with complex shapes. If we want to change the shape size of the parts, we only need to modify the processing procedure of the parts, which is suitable for the development modification of new products.

② The machining quality is stable, the machining precision is high, the repetitive precision is high, it can meet the machining requirements of aircraft.

③ In the case of multi variety small batch production, the production efficiency is higher, which can reduce the time of production preparation, machine tool adjustment process inspection, reduce the cutting time due to the use of cutting amount.

④ It can process complex surfaces which are difficult to be processed by conventional methods, even process some parts which cannot be observed.

The disadvantage of NC machining is that the cost of machine tools equipment is expensive, maintenance personnel are required to have a high level.