POM (Polyoxymethylene) is an engineering thermoplastic material that demonstrates excellent dimensional stability, stiffness and impact and temperature resistance. The material, also known as acetal or Delrin, can be produced two ways: as a homopolymer or as a copolymer.
POM materials are commonly used in the fabrication of pipe components, gear bearings, household appliances, automotive parts, consumer electronics and more.
Bead blasting results in parts with a smooth surface with a matte texture. Used mainly for visual applications and can be followed by other surface treatments.
Engineer's Pro Tips
- POM is a versatile and popular plastic in the engineering sector. Its high stiffness and hardness (with a Rockwell hardness of up to D80-85Z) make it a suitable alternative to certain metals, including ordinary carbon steel.
- In addition to hardness, POM has other properties that make it ideal for replacing metals. For example, it has insulation and wear resistance properties comparable to those of certain carbon steels.
- Generally, POM has good processing characteristics. However, it does demonstrate a high shrinkage rate (2% to 3.5%) and has poor corrosion resistance.
- Its elasticity can also result in deformation during the machining process caused by clamping or overheating. POM is also not conducive to polishing (the surface turns white) and cannot be plated or disassembled.