POM (Delrin) CNC Machining Service
XC Machining provides precision POM (Delrin) CNC machining services for custom prototypes and production components. Known for its excellent dimensional stability, low friction, high stiffness, and wear resistance, POM is widely used for gears, bushings, bearings, rollers, precision fittings, and industrial mechanical parts.
POM (Delrin) in CNC Machining
Polyoxymethylene (POM), also known as acetal, is a high-performance engineering thermoplastic widely used in CNC machining for its excellent dimensional stability, mechanical strength, and low-friction properties. Delrin is a well-known brand of POM homopolymer. Its low moisture absorption and good wear resistance make it suitable for precision components requiring reliable mechanical performance. POM can be CNC milled, turned, drilled, and threaded to manufacture accurate components such as gears, bushings, bearings, rollers, spacers, and custom mechanical parts. Different POM grades offer varying levels of stiffness, toughness, wear resistance, and chemical compatibility, allowing manufacturers to select the right material for specific engineering applications.
| Alloys available | POM-H, POM-C, Delrin 150, Delrin 500, PTFE-Filled POM |
| Price | $ |
| Lead time | Under 10 days |
| Wall thickness | 0.75 mm |
| Tolerances | ±0.125 mm (±0.005 in) |
| Max part size | 200 x 80 x 100 cm |
Machined POM Properties
Advantages and Limitations of POM CNC Machining
POM is widely used in precision CNC machining because of its excellent dimensional stability, low friction, mechanical strength, and wear resistance. Understanding its advantages and limitations helps manufacturers select the right acetal grade for gears, bushings, bearings, and industrial mechanical components.
- Excellent Dimensional Stability
POM offers low moisture absorption and reliable dimensional stability, making it suitable for precision components requiring consistent tolerances. - Low Friction and Wear Resistance
POM provides excellent sliding performance and good wear resistance for gears, bushings, bearings, and moving mechanical parts. - High Mechanical Strength
POM combines good stiffness, strength, and toughness for durable mechanical and industrial components. - Good CNC Machinability
POM can be efficiently milled, turned, drilled, and threaded to produce accurate dimensions and smooth surface finishes. - Low Moisture Absorption
POM absorbs relatively little moisture compared with materials such as nylon, supporting dimensional consistency in humid environments.
- Limited Heat Resistance
POM is not suitable for very high-temperature applications because prolonged heat exposure can affect its mechanical properties. - UV Sensitivity
Standard POM grades may degrade under prolonged ultraviolet exposure unless suitable stabilization is provided. - Bonding Difficulties
POM has low surface energy, making adhesive bonding and surface coating more challenging without specialized treatments. - Chemical Compatibility Limitations
POM can be damaged by strong acids and certain oxidizing chemicals, requiring careful material selection.
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POM CNC Machining FAQs
1. Why Is POM Used for CNC Machining?
POM is widely used in CNC machining because of its excellent dimensional stability, low friction, wear resistance, and mechanical strength. It is ideal for manufacturing precision gears, bushings, bearings, rollers, and industrial components requiring reliable performance.
2. What Is the Difference Between POM and Delrin?
POM is the general name for polyoxymethylene, also known as acetal, while Delrin is a specific brand of acetal homopolymer. Both offer excellent mechanical properties, but performance varies depending on the formulation, grade, and application requirements.
3. Which POM Grade Is Best for CNC Machining?
The best POM grade depends on the application. POM-H offers high stiffness and strength, POM-C provides good chemical resistance and dimensional stability, while PTFE-filled POM is suitable for components requiring improved sliding and low-friction performance.
4. Can POM Be CNC Machined to Tight Tolerances?
Yes. POM can be CNC machined to tight tolerances using precision equipment, sharp cutting tools, and controlled machining parameters. Its low moisture absorption and good dimensional stability make it suitable for accurate mechanical components.
5. What Are the Common Applications of POM CNC Machined Parts?
POM CNC machined parts are commonly used in automotive systems, industrial machinery, electronic equipment, automation systems, and mechanical assemblies. Typical components include gears, bushings, bearings, rollers, spacers, fittings, and custom precision plastic parts.