CNC used to use two kind of Machine to produce and each of the advantage as below.
Of course both of their accuracy can be in ±0.02mm even in ±0.01mm.
CNC’s value for you
1.Freedom of Design
2.Precisely size especially in wearable device
3.Smooth and beautiful
4.Because CNC doesn’t need mold , it’s economical when your demand under 5000 pcs. You can save money.
If you want to start a project, you have to find out which process, supplier, machine that meet your need.
When you choose the correct process, way and machine, you can not only save your money but improve your quality.