POM vs ASA
Compare POM and ASA filaments side-by-side so you can pick the right one for your 3D printing project.
POM vs ASA: POM is known for very low friction, while ASA is known for excellent uv resistance (outdoors indefinitely). ASA is easier to print; POM is less moisture-sensitive; ASA prints at higher nozzle temperatures (220-275°C vs 220-260°C). Choose POM for very low friction, or ASA for excellent uv resistance (outdoors indefinitely).
Key differences at a glance
POM
FAcetal / Delrin / Polyoxymethylene
Very low friction, stiff, easy to machine (in CNC contexts)
ASA
AAcrylonitrile Styrene Acrylate
Excellent UV resistance (outdoors indefinitely), tough, matte surface
Detailed Comparison
Green marks the generally easier or more forgiving option in that row, based on tier, enclosure needs, and moisture sensitivity. It is not always the better choice for a specific job, so weigh it against what your project actually needs.
Strengths Comparison
POM Strengths
- Very low friction, stiff, easy to machine (in CNC contexts)
- Low friction, wear parts, gears, bushings
ASA Strengths
- Excellent UV resistance (outdoors indefinitely), tough, matte surface
- Less warping than ABS; low viscosity enables very high speed printing
- High heat tolerance (~boiling water range)
Considerations
POM Caveats
- Near-zero bed adhesion; requires mechanical anchoring to bed surface
- Layer splitting; needs heated enclosure and very slow printing
- Heat decomposition can release formaldehyde (high hazard)
- Often outclassed by nylon for printable low-friction parts
ASA Caveats
- Still off-gasses; enclosure/ventilation recommended
- Can still warp; needs tuning