Materials

How should POM/Delrin, PA, PEEK and other engineering plastics be selected?

Choosing an engineering plastic is not only about stiffness; friction, moisture, temperature, chemicals and dimensional stability all matter.

Why does this matter?

Material choice affects everything from machining cost to service life. A stronger or more expensive grade is not automatically the better choice; the real operating conditions decide.

How should POM/Delrin, PA, PEEK and other engineering plastics be selected?

What should you check?

  • operating conditions and loads
  • corrosion, temperature or wear expectations
  • machinability and finishing compatibility
  • cost and supply continuity

A practical evaluation sequence

Start with where and how the part will work. Strength alone is not enough; corrosion, temperature, friction, moisture, weight, welding and finishing can all change the right material choice.

Common mistakes

  • Choosing material only by strength or price per kilogram
  • Confusing a trade name with an actual grade or standard
  • Separating finishing and service environment from the material decision
Decision rule

The right material is not the strongest on paper; it is the one that creates the lowest overall risk in the real application.

What should you send for evaluation?

  • available CAD, drawing or physical sample details
  • critical dimensions, tolerances or fit expectations
  • material and any finishing/heat-treatment requirement
  • target quantity, lead-time expectation and use case

Where can Gizmak help?

We review critical surfaces, dimensions and repeatability alongside the manufacturing method and inspection plan.

Precision machining

08 / Enquiry

Do you have a real part, drawing or CAD file?

Use the guide as a starting point, then share the actual technical data or physical sample so the manufacturing route can be reviewed against the real project.

Send your project