14/06/2026
CNC Secrets: A Guide to Precision Metal Machining
CNC machining is a subtractive manufacturing process where a computer controls cutting tools that remove raw material from a solid block to create a precise final shape. The technology is primarily divided into two types: Milling, used to create complex geometric shapes and flat surfaces, and Turning, primarily intended for cylindrical and symmetrical parts. The precision achieved in these processes is measured in microns and enables uniform, high-quality serial production.
Material selection is critical to project success, with the two most common aluminum alloys being 6061 and 7075. While Aluminum 6061 offers an excellent balance of strength, corrosion resistance, and reasonable cost, Aluminum 7075 provides tremendous strength comparable to certain steels but at a higher price and with low weldability. Understanding these nuances, alongside proper tolerance specification and appropriate finishes, is what distinguishes an amateur prototype from a leading industrial product.
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Master CNC machining with this guide to milling, turning, tolerances, and surface finishes. Learn how precision metal parts drive manufacturing success and