Depend on what you mean by "precision". How many levels of tolerance, or how much tolerance, in simple terms, is allowed to vary by 0.00mm. There is also a need to choose the processing equipment according to the material to be processed.
Ordinary precision: machining centers (CNC milling machine, CNC lathe) - recommended
More precise: CNC grinding machine
Special processing: EDM machine tools, wire cutting machine tools, electrochemical processing machine (electrolytic processing machine tools), laser processing machine, electron beam processing machine, ion beam processing machine
Specialty processing: EDM machine, WEDM machine, ECM machine (electrolytic processing machine), laser processing machine, electron beam processing machine, ion beam processing machine, ultrasonic processing machine, chemical processing machine, plasma processing, extrusion honing, magnetic abrasive grinding processing, magnetic abrasive electrolytic grinding processing, ceramicized aluminum alloy micro-arc oxidation surface processing.