Tier List

POM / Delrin

POM • Polyoxymethylene (Acetal)

F

CNC machinists' favorite - super stiff, easy to machine, low friction. But as filament: literally zero bed adhesion (must glue wood/paper to bed for mechanical grip). Layers want to split. If it gets too hot, degrades into formaldehyde.

specialtyEnclosure Required
Warnings
  • Degrades into FORMALDEHYDE (toxic, carcinogenic) if overheated
  • Polyoxymethylene is a euphemism - real name is polyformaldehyde
Print Settings
Print Temp200-230°C
Bed Temp120-140°C
Enclosure:Required
Material Properties
Strength70
Flexibility20
Heat Resistance75
Resistance Ratings
UV Resistance
Medium
Chemical Resistance
High
Humidity Sensitivity
Low
Usability
Ease of Printing
(1/5)
Price Tier
$$(Moderate)
Pros
  • Great for CNC
  • Low friction
  • Very stiff
Cons
  • ZERO bed adhesion
  • Must embed first layer in wood/paper fibers
  • Layers split apart
  • Nylon does it cheaper and easier
  • Degrades into formaldehyde if too hot
Use Cases
CNC machining (not printing)

Also known as: acetal, delrin, polyoxymethylene, polyformaldehyde

Data sourced from Zack Freedman / Voidstar Lab