POM, widely known by the trade name Delrin, is recognized for its strength, stiffness and excellent processing properties, making it an ideal material for producing durable and wear resistant parts. We provide high precision POM CNC machining services, using only new standard grade materials, never recycled or substandard materials.
POM CNC machining is the process of using computer-controlled machines to precisely cut and shape POM plastic into custom parts. POM is a strong, low-friction engineering plastic ideal for high-precision components. It’s commonly used in gears, bearings, and automotive or electronic parts due to its strength, wear resistance, and excellent dimensional stability.
POM is a high-performance engineering plastic widely used in precision parts. It combines strength, low friction, and excellent dimensional stability. Below are some key advantages of POM plastics :
POM is a tough plastic that can handle mechanical stress without bending or breaking easily. It’s ideal for making strong, load-bearing components that need to keep their shape.
Thanks to its smooth surface and low friction, POM is perfect for moving parts like gears, rollers, and bearings. It resists wear and tear, ensuring long-lasting performance.
POM parts maintain their shape and size even under temperature changes or mechanical load. This makes it suitable for precision parts that require tight tolerances.
Even in wet or humid environments, POM doesn’t absorb much water. This helps keep the parts stable and prevents swelling or warping over time.
POM resists many common chemicals like fuels, oils, and solvents, making it reliable in harsh industrial settings.
POM is easy to cut and shape using CNC machines. It offers clean finishes, high accuracy, and good surface quality, reducing the need for additional processing.
At VMT, we specialize in CNC machining of POM components, delivering high-precision parts for a wide range of industries. From prototyping to mass production, we support projects of all sizes with reliable quality and fast turnaround.
We use precision CNC turning to produce round and cylindrical POM parts with excellent surface finish and tight dimensional control.
Our CNC milling capabilities are perfect for machining flat, angled, or complex POM surfaces. We manufacture detailed components like covers, brackets, and mounting plates with high accuracy and repeatability.
With 3-axis and 5-axis machining, we can handle complex POM geometries in fewer setups, reducing lead time while maintaining tight tolerances.
POM is an engineering plastic known for its excellent balance of strength, stiffness, and low friction. It is widely used in precision parts that require high dimensional stability and good wear resistance. Below are the typical mechanical properties of POM, making it a reliable material choice for a variety of CNC machined components:
| Property | Typical Value | Unit | Description |
|---|---|---|---|
| Density | 1.41 | g/cm³ | Moderate density with high strength-to-weight ratio |
| Tensile Strength | 60–70 | MPa | Strong resistance to pulling forces |
| Tensile Modulus | 2,800–3,200 | MPa | High stiffness; resists deformation under load |
| Elongation at Break | 10–75 | % | Moderate flexibility depending on grade |
| Flexural Strength | 90–110 | MPa | Withstands bending forces without breaking |
| Impact Strength (Notched) | 3–10 | kJ/m² | Good impact resistance for engineering applications |
| Hardness (Rockwell) | M80–M90 | — | Hard surface suitable for wear-prone parts |
| Coefficient of Friction | 0.2–0.35 | — | Low friction, ideal for sliding or moving parts |
| Water Absorption (24h) | 0.2–0.5 | % | Very low moisture absorption, ensuring dimensional stability |
| Operating Temperature Range | -40 to +100 (short-term up to 140) | °C | Good thermal resistance for most industrial uses |
CNC machined POM parts are widely used across various industries thanks to their excellent mechanical strength, low friction, and dimensional stability. Below are some of the most common application areas:
1. Automotive Industry
Used in precision parts such as fuel system components, gears, bushings, clips, and interior mechanisms due to its strength, low friction, and resistance to fuels and chemicals.
2. Electronics and Electrical
POM is an excellent electrical insulator and is commonly used for switches, connectors, housings, and insulating parts in electrical assemblies.
3. Consumer Goods
Ideal for making durable and functional components in products like zippers, fasteners, locks, and handles due to its wear resistance and smooth surface finish.
4. Industrial Machinery
Used for precision mechanical parts such as guide rails, cams, rollers, spacers, and couplings that require both strength and low wear in dynamic environments.
Useful for rapid prototyping or small batch production of POM-like materials or engineering plastics with similar properties.
Including polishing, deburring, coating, and laser marking to improve appearance and functionality.
Integrating POM parts with other components (metal, rubber, plastic) into complete subassemblies or final products.
Is POM Good for Machining?
Yes, POM is excellent for machining. It offers high dimensional stability, low friction, and good chip formation. It can be easily turned, milled, drilled, and tapped using standard CNC equipment, making it ideal for precision parts.
What is POM in Mechanical Engineering?
In mechanical engineering, POM refers to Polyoxymethylene, a strong, rigid thermoplastic used for precision parts. It’s known for its wear resistance, low friction, and dimensional stability, commonly used in gears, bushings, and mechanical assemblies.
What is POM in Engineering?
POM also called acetal, is a high-performance engineering plastic. It’s widely used in various engineering fields for making strong, low-wear, and low-friction components with high precision and chemical resistance.
How to Cut POM Plastic?
POM can be cut using CNC machines, saws, or routers with sharp tools. Use moderate cutting speeds, keep the material well-clamped, and avoid overheating. Cooling or air-blowing can help maintain clean edges and dimensional accuracy.
Can VMT machine Delrin parts to tight tolerances?
Yes. We hold tolerances as tight as ±0.05mm on Delrin parts, depending on part geometry and wall thickness. Our team accounts for the material’s low moisture absorption and dimensional stability during the machining process.
Is Acetal suitable for parts that contact food or water?
Yes. Acetal Copolymer is commonly used in food and water contact applications due to its low moisture absorption and chemical resistance. Let us know your application and we can confirm the right grade.
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With a range of finishing services to choose from and guaranteed quality thanks to our inspection services you can trust you will receive great parts every time. Once you send us your 3D CAD file, one of our customer service engineers will check your design for manufacturability to ensure that the part can be made to your expectations and budget requirements. Contact us today for a free quote!
