CNC precision machining can reach a very high level of accuracy, and the standard of accuracy varies depending on the equipment and process requirements. The following are some specific precision data:

The machining accuracy of ordinary-grade CNC machines has been improved from 10 microns (μm) to 5 microns, while precision-grade machining has been improved from 3 to 5 microns to 1 to 1.5 microns.

Ultra-precision machining accuracy has begun to enter (0.01 micron).

CNC machines can achieve tolerances as low as +/- 0.001 inches, which equates to +/- 0.025 mm.

Most precision machining services can provide tolerances of +/- 0.051 mm +/- 0.005 mm.

High precision CNC machining equipment can achieve tight tolerances of up to 0.0025 mm.

CNC machining can achieve tolerances of +/- 0.00254 mm**, making precision CNC ideal for applications where assembly problems may occur.

CNC precision machining can achieve micron-level accuracy, depending on the machine used and the material being machined. These high precision machining capabilities make CNC precision machining widely used in the manufacture of high precision parts such as aerospace components, medical devices, and other products that require high precision.