What does cnc machining do?

Numerical Control Machining=Using a computer to control a machine and automatically cut materials such as metal and plastic into the parts you want.
How does it work?
You draw the part drawing (3D drawing) on the computer
Computer-generated program
The machine (CNC machine tool) automatically cuts according to the program
Directly produce high-precision parts without the need for manual labor
2. What can be done?
Almost all metal/plastic hard parts in mechanical and electronic products:
Phone case, phone frame
Automotive parts: shafts, gears, housings
Molds and hardware accessories
Aerospace precision parts
What you asked before: shafts, disks, and irregular 3D parts
3. Characteristics (summarized in one sentence)
High precision: with very small errors, at the millimeter and micrometer levels
Fast speed: suitable for mass production
No need for constant monitoring: automatic processing
Can make complex shapes: it can make anything that ordinary machine tools cannot