Typical nylon
- Tough with optional glass fill for structure
- Absorbs moisture that shifts dimensions
- Good for snap fits and impact loaded brackets
Engineering resin comparison
Nylon vs Acetal: Wear, Moisture, and Dimensional Stability
Acetal holds dimensions in wet environments. Nylon brings toughness and fiber options for load bearing parts.
Engineering resin comparison
Two workhorse engineering plastics
Both suit gears, bushings, and mechanisms. Moisture and load type decide the winner.
Acetal is often chosen for precision gears in humid environments because it absorbs less water than nylon.
Nylon, especially glass filled grades, carries higher structural loads and impact.
Resin choice
Typical versus Typical at a glance
Use this routing before you lock the BOM. NetProto molds both once the resin is specified on the quote.
Typical acetal (POM)
- Low friction and stable dimensions in wet service
- Excellent machinable detail in molded gears
- Avoid thick sections that can porosity trap gas
Decision table
Where each resin usually wins
Qualitative tradeoffs for molded parts. Confirm shrink, fill, and tooling details on the material guide.
| Factor | nylon | acetal (POM) |
|---|---|---|
| Moisture | Absorbs, size changes | Low absorption |
| Wear | Good with lubricated grades | Excellent inherent lubricity |
| Impact | Higher | Moderate, brittle at cold if unfilled |
| Fill | Glass fill common for structure | Low shrink, good for tight gears |
Before you quote
Send this context with your CAD
The instant quote uses your material choice for fill, gate, and steel assumptions.
Operating humidity or wash down
Load type (wear vs impact)
Need for FDA or food contact grade
Mating metal or plastic in the assembly
Material guides
Full property pages
These library pages carry datasheets, DFM notes, and quote checklists.
Nylon
Open the Nylon molding guide.
NylonAcetal (POM)
Open the Acetal (POM) molding guide.
Acetal (POM)Continue exploring
Related comparisons
Open a sibling guide or jump to the full material library.
Compare hub
All comparison guides.
Compare hubMaterials library
Deep guides per resin family.
Materials libraryNylon 6 vs 66
Within the nylon family.
Nylon 6 vs 66Acetal vs nylon wear
Wear focused view.
Acetal vs nylon wearFAQ
Common questions
Which squeaks less in plastic on plastic contact?
Acetal is often chosen for low noise sliding pairs. Nylon can be quieter with internal lubricant grades.
Next step
Quote both options with the same CAD
Upload once, switch resin in the quote flow, and compare piece price on the same tool. NetProto manufacturing is ISO 9001 certified.