Delrin CNC Machining Services

What is Delrin (POM) CNC Machining?

Delrin® (acetal homopolymer, POM-H) and acetal copolymer (POM-C) are stiff, low-friction engineering plastics used for gears, bushings, wear guides, fixtures, and precision mechanisms. They machine quickly and hold tight tolerances with clean edges.

• Tooling: Sharp O-flute / polished carbide; high rake to shear cleanly.
• Heat control: Prefer air blast or mist; avoid chip-weld/melting.
• Feeds/Speeds: Higher feed with modest step-over; constant chip load.
• Workholding: Soft jaws/vacuum; support thin walls to prevent chatter.

Key Considerations

POM-H (Delrin) has slightly higher strength/stiffness; POM-C offers better hot-water/chemical resistance and lower center-line porosity on thick sections. Both cut best with sharp tools and steady chip flow.

For precision parts: rough → optional stress relief/anneal → finish passes. Deburr lightly to keep edges crisp; plan a skim pass on show faces for uniform texture.