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POM (Delrin) CNC Machining Service

Get high-quality Polypropylene (PP) CNC machined parts with excellent chemical resistance, lightweight performance, and durability. Our precision machining capabilities deliver custom PP components with accurate dimensions, smooth finishes, and reliable performance for various industrial applications.

Collection of black and white POM Delrin machined parts: a plastic gear, flanged bushing, threaded fittings, blocks and rings

POM (Delrin) in CNC Machining

POM (Polyoxymethylene), also known as Delrin, is a high-performance thermoplastic valued for its strength, rigidity, low friction, and excellent machinability. Its strong wear resistance and dimensional stability make it suitable for precision CNC machined components.
CNC machining allows POM to produce accurate parts with smooth surfaces and complex geometries. It is commonly used for automotive components, electronic parts, consumer products, gears, bearings, bushings, and industrial machinery where low friction and reliable performance are important.

Available POMHigh-quality POM material in various grades to suit diverse applications
Precio$
Plazo de entregaUnder 10 days
Grosor de la paredMinimum 0.8 mm
Tolerancias±0.125 mm (±0.005 in)
Tamaño máximo de la pieza1200 × 500 × 150 mm
Two black POM Delrin plates CNC machined with rectangular center cutouts and drilled mounting holes

POM (Delrin) CNC Machining Materials

Machined POM Properties

POM (Delrin) is an engineering thermoplastic valued for its strength, stiffness, low friction, and excellent machinability. These properties make it suitable for precision CNC machined components that require dimensional stability and reliable wear performance.

Tensile Yield (MPa)
70
Tensile Modulus (GPa)
200–600
Elongation at Break (%)
3
Hardness (Brinell)
M85
Flexural Strength (MPa)
90

Advantages and Limitations POM (Delrin) CNC Machining

POM (Delrin) offers excellent dimensional stability, low friction, and wear resistance, making it suitable for precision CNC machined parts. However, it also has some limitations to consider during material selection.

 

Ventajas
  • High Dimensional Stability:
    POM maintains accurate dimensions and performs consistently under changing operating conditions, making it suitable for precision components.
  • Low Friction:
    Its low friction coefficient makes POM ideal for gears, bearings, bushings, and other moving parts that require smooth operation.
  • Excellent Wear Resistance:
    POM withstands repeated movement and friction, helping extend the service life of components used in demanding applications.
  • Good Chemical Resistance:
    POM resists many solvents, oils, and fuels, making it suitable for automotive and industrial environments.
  • Excellent Machinability:
    POM cuts cleanly and allows manufacturers to produce precise, complex components with smooth surface finishes.
Limitations
  • Susceptibility to Cracking:
    POM can crack under excessive stress or impact, particularly when used in demanding mechanical applications.
  • Higher Material Cost:
    POM can cost more than some other engineering plastics, which may affect material selection for budget-sensitive projects.
  • Tool Wear:
    Some POM grades can contribute to tool wear during machining, requiring appropriate tooling and machining parameters.
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Tolerancias de mecanizado CNC

Nuestras máquinas CNC funcionan con tolerancias de precisión que cumplen las normas del sector, lo que garantiza que cada pieza sea siempre exacta y encaje perfectamente con otros componentes.

Tipo de funciónTolerancia típica
Tolerancia dimensional general±0.025 mm (±0.001″)
Tolerancia de alta precisión±0.005 mm (±0.0002″)
Diámetro del agujero (perforado)±0.05 mm (±0.002″)
Diámetro del agujero (escariado/taladrado)±0.01 mm (±0.0004″)
Sh​​aft Diameter (Turned)±0.01 mm (±0.0004″)
Planitud0,02 mm por 100 mm
Paralelismo±0,02 mm
Perpendicularidad±0,02 mm
Rugosidad superficial (Ra)1.6–3.2 μm (63–125 μin)
Tolerancia posicional±0,01 mm a ±0,02 mm
Tolerancia de la rosca (corte)6H / 6g (ISO) o Clase 2A/2B (ANSI)
Tamaño mínimo del elemento0.5 mm (0.020″)
Repetibilidad±0.005 mm (±0.0002″)

Polypropylene CNC Machining FAQs

POM is a type of acetal thermoplastic known for its strength, stiffness, low friction, and excellent machinability. Acetal is the broader material family, while POM is the chemical name commonly used for acetal plastics.

POM and Delrin belong to the same material family. Delrin is a specific brand of POM, while other manufacturers offer POM under different trade names and grades.

They are related but not exactly interchangeable. Acetal refers to a broader category of engineering plastics, while Delrin is a specific branded acetal material. The exact properties can vary by grade and manufacturer.

POM can crack under excessive stress, impact, or unsuitable operating conditions. Proper part design, machining parameters, and material selection can help reduce the risk of cracking.