CNC-machined parts are components produced using CNC equipment. CNC machining generally refers to a precision machining method controlled by computerised digital systems, and has now become a widely used machining technique. The equipment used for CNC machining is known as a CNC machine tool.

This article provides an in-depth analysis of the complete process for CNC machining of prototypes, examining the technical key points and quality control methods for each stage in turn—from drawing preparation, programming and material selection to machining and post-processing. Particular focus is placed on the fields of metal prototypes, precision structural components and parts requiring high surface finish standards.