POM CNC Machining – High-Stiffness, Low-Friction Plastic Parts (Delrin / Acetal)
POM (Polyoxymethylene), commonly known as Delrin or acetal, is an engineering thermoplastic that offers excellent stiffness, low friction, high wear resistance, and dimensional stability. It is widely used for precision mechanical components where metal-like strength and low maintenance are required. At Ranglink, we specialize in CNC machining of POM for prototypes and production runs – from gears to bearings and bushings.
– High mechanical strength and rigidity.
– Naturally low coefficient of friction (self-lubricating).
– Excellent wear and fatigue resistance.
– Good dimensional stability (low moisture absorption).
– Easy to machine with close tolerances.
Key Properties of POM (Delrin / Acetal)
| Property | Value / Rating |
|---|---|
| Tensile strength (yield) | ~70 MPa |
| Flexural modulus | ~2.6 GPa |
| Izod impact strength (notched) | ~7 kJ/m² |
| Coefficient of friction (dynamic) | 0.20 – 0.35 (self-lubricating) |
| Continuous use temperature | –40°C to 90°C |
| Heat deflection temperature (1.82 MPa) | ~110°C |
| Density | 1.41 g/cm³ |
| Water absorption (24h) | 0.2% – low |
| Machinability rating | Excellent (similar to brass with sharp tools) |
Our CNC Machining Capabilities for POM (Delrin)
| Parameter | Specification |
|---|---|
| Max part size (milling) | 1100 × 600 × 500 mm |
| Max turning diameter | Ø230 mm |
| Standard tolerance | ±0.05 mm |
| Precision tolerance | ±0.005 mm (on request) |
| Surface roughness (as machined) | Ra 0.8 μm |
| Lead time (prototypes) | 3 business days |
Processes available: CNC Turning · CNC Milling (3‑axis, 4‑axis, full 5‑axis) · CNC Drilling & Tapping · Threading · Precision deburring.
Surface Treatment & Post-Processing for POM
Note: POM is naturally low-friction and does not require coatings for most mechanical applications. For improved wear or UV resistance, specialized coatings are available on request.
Common Applications of CNC Machined POM (Delrin)
Quality Assurance
- ISO 9001:2015 certified – audited quality management system.
- Full traceability – material certificates and inspection reports.
- Inspection equipment – CMM, calipers, micrometers, optical comparator.
- Every part inspected – dimensional accuracy, surface finish, and stress‑free condition verified.
Why Choose Ranglink for POM (Delrin) CNC Machining?
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