# POM (Delrin / Acetal)

> The machinist's favorite: stiff, slippery, stable — plastic parts with metal-like precision.

- Category: Engineering Plastics → commodity
- HTML page: https://fabvector.com/materials/pom-delrin (Portuguese: https://fabvector.com/pt/materials/pom-delrin)
- Price index: $ (1–5, 6061-T6 = $)

## Mechanical properties (typical values, not certified minimums)

| Property | Value |
|---|---|
| Tensile strength | 70 MPa |
| Yield strength | ~70 MPa |
| Hardness | M89 (Rockwell) |
| Density | 1.41 g/cm³ |
| Machinability | ★★★★★ (5/5) |
| Corrosion resistance | ★★★☆☆ (3/5) |

## When to choose it

The part should be plastic but needs metal-like precision: POM machines crisply, holds ±0.02 mm routinely and shrugs off humidity that swells nylon. The default for gears and fixtures.

## When to look elsewhere

The assembly relies on adhesives or paint (POM low surface energy repels both — use ABS), or service exceeds ~90 °C continuous — step up to PPS or PEEK for heat.

## Typical applications

- Precision gears, sprockets and cams
- Bushings and dry-running bearings
- Test fixtures, jigs and robot gripper jaws
- Food machinery contact parts (FDA grades)

## Compatible surface finishes

- [As-Machined](https://fabvector.com/md/finishes/as-machined)
- [Vibratory Tumbling](https://fabvector.com/md/finishes/vibratory-tumbling)
- [Laser Marking](https://fabvector.com/md/finishes/laser-marking)

Industries: robotics, industrial-automation, automotive, medical-devices · Instant quote: https://fabvector.com/quote