How Does CNC Milling Work?

CNC milling is a subtractive manufacturing process that removes material from a block of metal or plastic to form a final part. Get your FREE CNC design essentials guide: https://get.protolabs.com/cnc-essentials/?utm_source=YouTube&utm_medium=Social&utm_campaign=us-cnc-guide&utm_content=design-essentials&utm_term=

How Does CNC Milling Work?
CNC milling is a subtractive manufacturing process. It starts by fixturing a block of metal or plastic material inside the CNC mill. Using G-code, the CNC machine is programmed to rapidly mill out parts from the block of raw material. Our 3- and 5-axis CNC machines are equipped with various toolsets to maximize efficiency and production speed.

Machined plastic parts are left as-milled, which typically means they show visible tool marks. Some metal parts allow more finishing choices like anodizing and chromate plating. When the run is complete and your required surface finish is applied, parts are boxed and shipped shortly thereafter.

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