CNC ultra-precision machining, pressing the bulge by hand, can be integrated with the plane. Ultra-precision machining is a machining method with machining accuracy up to 0.1 micron. Precision machining mainly includes fine turning, fine boring, fine milling, fine grinding and grinding technology.

Precision machining is realized by using precision machine tools and measuring instruments under strictly controlled environmental conditions. Machining accuracy of 0.1 micron or more is called ultra-precision machining.

In the aerospace industry, precision machining is mainly used to process precision mechanical parts in aircraft control equipment, such as precision mating parts in hydraulic and pneumatic servo mechanisms, gyroscope frame, shell, air float, liquid float bearing assembly and float, etc. The precision parts of aircraft have complex structure, small stiffness, high precision, and the proportion of difficult-to-process materials is large.