CNC machining, uas tseem hu ua precision machining, yog txheej txheem hlau txiav los yog tshem tawm los ntawm Computerized Numberical Control (CNC luv luv). Nws yog pab los ntawm CNC kom ncav cuag qhov tseeb thiab ruaj khov nrog cov nqi zog tsawg. Precision machining yog ib qho ntawm ntau cov txheej txheem uas ib qho ntawm cov khoom siv raw (feem ntau lawv yog casting blanks, forged blanks los yog structural hlau cov ntaub ntawv) yog txiav mus rau hauv ib tug xav tau kawg cov duab thiab loj los ntawm ib tug tswj cov khoom-tshem tawm txheej txheem. Thaum cov hlau alloy hlau CNC machining qhov chaw yog cov khoom ua haujlwm ua los ntawm cov hlau hlau (hauv cov ntaub ntawv ntawm castings, forgings lossis alloy steel qauv) los ntawm CNC tshuab.