POM Acetal (Polyoxymethylene) — The Complete CNC Machining Plastics Guide

What Is POM Acetal Plastic?

POM (Polyoxymethylene), also known as acetal or Delrin, is a highly crystalline engineering thermoplastic. Its combination of high stiffness, low friction, and excellent dimensional stability makes it ideal for precision mechanical components.

Key Properties of POM

• Tensile Strength: 60–70 MPa
• Flexural Modulus: 2,500–2,800 MPa
• Melting Point: 165–175°C
• Coefficient of Friction: 0.2–0.35

CNC Machining Best Practices

Use sharp carbide tools, 150–250 m/min cutting speed for turning, and air blast or flood coolant.

常見應用

Gears, sprockets, bearings, bushings, guide rails, food processing equipment, and medical device components.