POM-C (acetal, Delrin type) for CNC machining

Gears, bushings, sliding parts, fixtures, food-contact parts (with the right grade).

Family

Plastic

Density

1.41 g/cm³

Machinability

excellent (5/5)

Relative cutting speed

about 120% of aluminium 6082

Indicative price

€10 per kg

What to know

The easiest plastic to machine accurately. Low friction and dimensionally stable.

Design tips

Plastics expand far more with temperature than metals and can move after machining. Use looser tolerances (±0.1 mm or more) and avoid tight fits over long lengths.