Surface Finishing for Delrin (POM / Acetal)
Delrin surface finishing options are limited. The material is difficult to paint or bond. Most applications use the as-machined finish, which is already smooth and functional.
Recommended Machining Parameters
| Parameter | Value |
|---|---|
| Achievable Tolerances | ±0.02 mm (finished) |
| Surface Finish | Ra 0.4-1.6 μm |
| Cutting Speed | N/A |
| Feed Rate | N/A |
| Tooling Recommendations | N/A — post-machining process |
Expert Machining Tips
1
As-machined finish is standard and usually sufficient
2
Bead blast for uniform matte look
3
Cannot be easily painted or glued
4
Consider colored Delrin stock for cosmetic needs
Common Parts Made
As-machined gears
Polished bearing surfaces
Bead-blasted covers
Machining Challenges
- Cannot be painted or bonded
- Very limited finishing options
- Color only through stock material selection