Polyoxymethylene (POM), also referred as acetal and Delrin, is well known for its use as an engineering plastic, for example in parts which move or require high precision.
Acetal as a material sees common use as gears, bearings, camera focusing mechanisms and zippers.
POM performs exceptionally well in these types of applications due to its strength, rigidity, resistance to wear, and most importantly, its low coefficient of friction. It’s thanks to this last property that POM makes such a great 3D printer filament.
For most of the types of 3D printer filament in this list, there is a significant gap between what is made in industry and what you can make at home with your 3D printer. For POM, this gap is somewhat smaller; the slippery nature of this material means prints can be nearly as functional as mass-produced parts.
Make sure to use a heated print bed when printing with POM 3D printer filament, as the first layer doesn’t always want to stick.
When Should I Use Acetal (POM) 3D Printer Filament?
Any moving parts that need to be low friction and tough. We imagine gearing mechanisms in projects using motors (such as RC cars) could be an applicable field for POM.