Features of POM Machined Parts

POM (Polyoxymethylene), also known as acetal or Delrin, is a versatile engineering thermoplastic known for its excellent mechanical properties, low friction, and dimensional stability. Machined parts made from POM are widely used in various industries due to their durability, strength, and resistance to wear. Here’s an overview of POM machined parts, including their features, applications, benefits, machining considerations, and popular uses.

Features of POM Machined Parts

1. Mechanical Properties:

  - High Strength: Comparable to metals like aluminum.

  - Stiffness: Provides rigidity and dimensional stability.

  - Impact Resistance: Withstands heavy loads and impact without breaking.

  - Low Friction: Self-lubricating properties make it suitable for moving parts.

2. Chemical Resistance:

  - Resistant to chemicals, oils, greases, and solvents.

  - Suitable for applications where exposure to harsh chemicals is a concern.

3. Dimensional Stability:

  - Maintains tight tolerances and shapes over a wide range of temperatures.

  - Minimal moisture absorption compared to other plastics.

4. Electrical Properties:

  - Good electrical insulation properties.

  - Suitable for electrical and electronic applications.

5. Surface Finish:

  - Can achieve smooth surface finishes with machined parts.

  - Capable of holding fine details and intricate designs.

Applications

1. Automotive Industry:

  - Automotive Components: Gears, bushings, bearings, fuel system components, and interior trim parts.

  - Safety Systems: Handles, locks, and mechanisms due to its durability and impact resistance.

2. Consumer Goods:

  - Sporting Goods: Ski bindings, fasteners, and gears in outdoor equipment.

  - Appliances: Parts for dishwashers, washing machines, and small household appliances.

3. Engineering and Manufacturing:

  - Machinery Parts: Gears, rollers, cams, and pump components due to its low friction and wear resistance.

  - Tooling: Jigs, fixtures, and tool handles for their toughness and dimensional stability.

4. Medical and Pharmaceutical:

  - Surgical Instruments: Handles, gears, and trays due to its biocompatibility and sterilization resistance.

  - Drug Delivery Systems: Components in inhalers and injection devices.

5. Electrical and Electronics:

  - Insulators and Enclosures: Electrical insulating components, connectors, and housings.

  - Consumer Electronics: Gears, springs, and components for cameras, printers, and copiers.

Benefits of POM Machined Parts

1. Durability: Resistant to wear, abrasion, and fatigue, offering long service life.

2. Dimensional Stability: Maintains tight tolerances and shapes over a wide range of temperatures (-40°C to 120°C).

3. Ease of Machining: Machine-friendly material with good chip control and minimal tool wear.

4. Cost-Effective: Lower machining costs compared to metals while still offering high performance.

5. Versatility: Suitable for a wide range of applications across various industries due to its versatile properties.

Machining Considerations

1. Tool Selection: Carbide tools are typically used for machining POM due to its abrasive nature.

2. Cooling: Cooling with air or mist is preferred over flood cooling to prevent dimensional changes due to moisture absorption.

3. Chip Control: Proper chip evacuation is crucial to avoid buildup and achieve clean cuts.

4. Surface Finish: POM can achieve a smooth surface finish with the right machining techniques and tools.

Popular Uses and Industries

- Automotive: Gear parts, fuel system components, and interior trim.

- Consumer Goods: Sporting equipment, small appliances, and toys.

- Engineering: Machine parts, tooling, and fixtures.

- Medical: Surgical instruments and drug delivery systems.

- Electrical and Electronics: Insulators, connectors, and housings.

Conclusion

POM machined parts offer exceptional mechanical properties, chemical resistance, and dimensional stability, making them ideal for a wide range of applications across diverse industries. Whether used in automotive, consumer goods, medical, or electronics sectors, POM parts provide durability, reliability, and cost-effectiveness compared to traditional metal components. Proper machining techniques and considerations ensure high-quality finished products that meet stringent performance requirements.