Engineering Plastic

Acetal Sheet & Rod

Wear · Load · Precision machining

Get A Quote Call 07 5564 6744

±0.1mm

Precision Tolerance

35+ Years

On The Gold Coast

Full Range

Perspex, HDPE & More

Australia-Wide

Fast Delivery

Trade Names: Delrin, Ertacetal. Acetal is an engineering plastic with excellent dimensional stability, high mechanical strength, and natural lubricity — making it ideal for precision machined components.

Acetal is often the first choice for replacing metal components in precision mechanisms. Its low moisture absorption ensures parts maintain tight tolerances in varying humidity conditions, unlike nylon which can swell. Acetal is widely used in food processing, automotive, and general engineering.

⚙Technical Specifications

Material Type

Acetal (POM — Polyoxymethylene)

Specific Gravity

1.41

Tensile Strength

~70 MPa

Impact Strength

Good

Continuous Service Temp

−45°C to 100°C

Water Absorption (24 hrs)

0.2%

Coefficient of Friction

Low — natural lubricity

Creep Resistance

Excellent

Dimensional Stability

Excellent

Chemical Resistance

Good (resistant to many solvents)

Machinability

Excellent

FDA Approved

Yes (natural grade)

Quick Facts

✓ Over 35 years experience
✓ No minimum order
✓ Fast turnaround
✓ Australia-wide delivery

Get A Free Quote (07) 5564 6744

Applications

Precision gears and sprockets

Bearings and bushings with close tolerances

Electrical engineering insulators

Snap fit assemblies and clips

Pump and valve components

Food processing equipment — conveyors, guides

Components operating in water (60–90°C)

Available Sizes

Form	Sizes	Colours
Sheet	10, 12, 15, 20, 25, 30, 40, 50mm — 2000 x 610mm / 3000 x 610mm	White, Black
Rod	5–90mm diameter	White, Black

Fabrication & Processing

Acetal is one of the best engineering plastics for precision CNC machining. It produces short, clean chips, holds tight tolerances, and gives excellent surface finishes. Unlike nylon, acetal does not require pre-drying before machining.

CNC turning — achieves tolerances of ±0.05mm

Milling — use sharp carbide cutters at high speed

Drilling — standard HSS drill bits, use moderate feed rate

Tapping — excellent thread holding strength

Note: acetal cannot be solvent bonded — use mechanical fasteners or cyanoacrylate

Frequently Asked Questions

What is the difference between Delrin and Acetal?+

Delrin is DuPont's brand name for acetal homopolymer (POM-H), while generic acetal is typically copolymer (POM-C). Homopolymer has slightly higher mechanical strength and stiffness, while copolymer has better chemical resistance and easier processing. For most applications, the performance difference is minimal.

Can acetal be glued?+

Acetal is very difficult to bond with adhesives due to its low surface energy and chemical resistance. Cyanoacrylate (super glue) gives moderate bond strength. For structural joints, mechanical fastening (screws, press-fits, snap-fits) is strongly recommended.

Is acetal suitable for food contact?+

Yes — natural (white/cream) acetal is FDA approved for direct food contact. It is widely used in food processing machinery for conveyor components, guides, and rollers.

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