Ultem PEI 9085 — Aerospace-Grade 3D Printing and CNC Material

Last updated: April 21, 2026

POM (Polyoxymethylene), also known as acetal or Delrin, and nylon are the two most widely used engineering plastics for precision mechanical components. Both offer excellent mechanical properties, good wear resistance, and proven reliability in demanding applications.

Key Property Differences

POM has a coefficient of friction of 0.15-0.35 vs nylon’s 0.3-0.5, with moisture absorption of only 0.2-0.3% vs nylon PA66’s 8-9%. POM’s tensile strength is 60-70 MPa while nylon PA66 offers 80-85 MPa. Maximum continuous temperature is 100°C for POM vs 200°C for nylon. For high-load applications, consider our PA66-CF30.

When to Choose POM/Acetal

POM is preferred for precision gears and bearings (lower friction), applications requiring dimensional stability, food contact applications (FDA-compliant grades), and high-speed rotating parts.

When to Choose Nylon

Nylon is better for high-load applications, elevated temperatures, noise reduction requirements, and impact resistance applications.

Source Engineering Materials

As a specialized source manufacturer, we supply both POM and nylon materials in rod, sheet, and tube forms. اتصل بنا for material selection assistance and pricing.

POM vs Nylon — Frequently Asked Questions

Which material is better for precision gears: POM or Nylon?

POM (Acetal/Delrin) is preferred for precision gears due to its lower coefficient of friction (0.15-0.35 vs 0.3-0.5 for nylon), excellent dimensional stability with low moisture absorption (0.2-0.3%), and good wear resistance. POM gears operate quietly and maintain precise dimensions.

When should I choose nylon over POM?

Choose nylon (PA66) when your application requires higher load capacity (80-85 MPa vs 60-70 MPa for POM), elevated temperature resistance (200C continuous vs 100C for POM), superior impact resistance, or noise reduction.

Where can I source POM and nylon materials?

Nylonplastic is a specialized manufacturer established in 2005 with ISO9001/14001/45001/IATF16949 certifications. We supply POM homopolymer, POM copolymer, PA6, PA66, and PA12 in rod, sheet, and tube forms. Our 300+ CNC machines can machine these to 0.02mm tolerance. Contact us for free samples.