POM or PA66 for Wear-Resistant Plastic Parts: How to Choose the Base Resin
Before choosing PTFE, aramid fiber, glass fiber, or other wear-resistant additives, buyers should first decide the base resin. POM and PA66 are both widely used in moving plastic parts, but their behavior is different.
1. Why Base Resin Selection Matters
Before choosing PTFE, aramid fiber, glass fiber, or other wear-resistant additives, buyers should first decide the base resin. POM and PA66 are both widely used in moving plastic parts, but their behavior is different.
DGK-POM TF90M and DGK-PA66 FL20L. are the two product pages most relevant for comparing POM + PTFE and aramid PA66 wear-resistant routes.
POM is often selected for low friction and dimensional stability. PA66 is often selected for toughness, strength, and load-bearing support.
A wrong base resin may make later modification more difficult.
2. POM Direction
POM, acetal, or polyoxymethylene is suitable when the part needs:
low friction; stable dimensions; good gear accuracy; smooth sliding; low moisture sensitivity compared with PA66; good precision molding.
Common routes:
ordinary POM; POM + PTFE; POM + internal lubricant; glass-fiber reinforced POM; conductive or antistatic POM if static control is required.
Suitable parts:
gears; rollers; sliders; guide blocks; precision moving parts.
3. PA66 Direction
PA66, nylon 66, or polyamide 66 is suitable when the part needs:
higher toughness; better load-bearing ability; heat resistance; impact strength; structural support; reinforcement options.
Common routes:
PA66 + PTFE; aramid reinforced PA66; glass-fiber reinforced PA66; MoS₂ modified PA66; hybrid wear-resistant nylon.
Suitable parts:
bushings; guide rails; brackets; sliding supports; automotive functional parts.
4. Comparison Table
| Item | POM Direction | PA66 Direction |
|---|---|---|
| Main advantage | Low friction, dimensional stability | Toughness, strength, load support |
| Moisture influence | Lower | Higher |
| Typical modification | PTFE, lubricant, fiber | Aramid, PTFE, glass fiber, MoS₂ |
| Typical part | Gear, roller, slider | Bushing, guide rail, bracket |
| Risk | Tooth chipping, wear powder | Moisture shift, clearance change |
| Validation focus | Noise, wear depth, gear accuracy | Clearance, vibration, conditioning |
5. DEYU Route Selection Example
| Failure Mode | Possible Route |
|---|---|
| Gear noise and wear powder | DGK-POM TF90M POM + PTFE |
| Bushing clearance growth | DGK-PA66 FL20L aramid PA66 |
| High load and deformation | project-specific glass-fiber PA66 route |
| Need stiffness and low friction | project-specific hybrid route |
| Need low wear and low noise | POM + PTFE or PA66 + PTFE comparison |
Conclusion
POM and PA66 are both useful for wear-resistant plastic parts, but they should not be selected interchangeably. POM is often better for precision low-friction movement, while PA66 is often better for tougher and more structural moving parts.
DEYU can support DGK-POM TF90M and DGK-PA66 FL20L route comparison, small-batch validation, product data replacement, and final-part debugging.
