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Acetal POM-C 500

Extruded POM-C (acetal copolymer) grade 500 — a low-friction, dimensionally stable plastic that Thai CNC shops machine to tight tolerances for precision wear parts.

Get an instant quote Lead time: CNC 3-5 business days; injection molding 10-15 days after tooling

Key properties

Key properties
Tensile strength ~65-70 MPa
Low coefficient of friction (self-lubricating)
Excellent dimensional stability in humid conditions
Continuous service to ~100°C
Very low moisture absorption (<0.3%)
Good wear and fatigue resistance

Common applications

  • Precision gears and pulleys
  • Bearings and bushings
  • Valve seats and pump parts
  • Insulators and electrical components
  • Food-contact parts (FDA grades)
  • Jigs and fixtures

Processes available

  • CNC milling
  • CNC turning
  • Injection molding

Surface finishes

  • As machined
  • Polished (low-friction surfaces)
  • Centerless ground
  • Textured

Cost & pricing

Mid-priced engineering plastic — economical for tight-tolerance machined parts with long service life.

Tolerance: ±0.05mm typical on machined features; ±0.02mm achievable on ground diameters.

Frequently asked questions

POM-C or POM-H for machining?
POM-C (copolymer) resists hot water and alkalis better and is the common machining grade; POM-H (homopolymer) gives slightly better wear but is more sensitive to chemicals.
Why do machined acetal parts hold size better than nylon?
Acetal absorbs far less moisture (~0.2% vs ~2% for nylon), so dimensions stay stable in Thailand’s humid climate.

Frequently asked questions

How long does production take?

Lead time depends on the process and quantity — 3D printing typically ships in 2–3 business days, CNC machining in 3–5, and injection molding in 10–15 after tooling. You'll see the exact lead time on every quote.

What is the standard tolerance?

CNC-machined parts are held to ±0.1 mm as standard, with ±0.05 mm achievable on critical features. 3D-printed parts are typically ±0.2–0.3 mm. Add your critical dimensions in the notes field.

What is the minimum order quantity?

There is no minimum order — we produce single prototype parts as easily as large production runs. Quantity discounts start from around 10–25 pieces.

What surface finishes are available?

A wide range of finishes is available locally, including as-machined/printed, bead blasting, anodizing (clear, black, gold), powder coating, painting and polishing.

How do I get a quote?

Upload your CAD file (STL, STEP, IGES or 3MF) to the instant-quote tool — the VoluFab pricing engine returns a real quote in seconds, with DFM feedback included.

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