CNC Machining in POM/Delrin – What is POM Plastic CNC POM Machining services produce plastic parts that come with exceptional performance, accuracy, and repeatability. What is POM plastic and why it is used in CNC machining? POM (Polyoxymethylene), also known as Delrin and Acetal, is an engineering thermoplastic characterized by its high stiffness, good machinability, excellent rigidity, low friction, high