Engineering plastic
POM / Delrin / Acetal
POM-H, POM-C
The default precision plastic for low friction, stable dimensions and clean CNC machining.
01 · QUICK ANSWER
When should you choose POM / Acetal?
Choose acetal copolymer for broad chemical resistance and lower centerline porosity risk. Choose Delrin homopolymer when slightly higher stiffness and fatigue performance matter.
02 · SELECTION DATA
Typical properties at a glance
Screening values only. Final design data must follow the exact grade, condition, stock form and supplier certificate.
Density1.40–1.43 g/cm³
Strength range60–75 MPa tensile yield
TemperatureContinuous use often ≤100°C
MachinabilityExcellent
03 · ENGINEERING NOTES
Specify what changes the result
A material name alone is not enough. Include grade, condition, finish and documentation on the drawing or purchase specification.
- POM-C
- POM-H / Delrin
- Delrin AF
- Glass-filled acetal
- Precision gears
- Bearing blocks
- Valve components
- Inspection fixtures
- Creep under sustained load
- Limited bonding performance
- Avoid strong acids and prolonged high heat
- As machined
- Tumbled
- Light bead blast
- Laser mark
04 · MANUFACTURING FIT
Available process routes
CNC machiningCommonly available
Sheet metalReview by grade and geometry
3D printingReview by grade and geometry
05 · NEXT COMPARISON