Rapid Prototyping for Delrin (POM / Acetal)

Delrin rapid prototyping is fast, affordable, and produces parts that are fully representative of production quality. It is the go-to engineering plastic for prototype gears, bearings, and mechanical parts.

Recommended Machining Parameters

ParameterValue
Achievable Tolerances±0.02 mm
Surface FinishRa 0.8-1.6 μm
Cutting Speed150-400 m/min
Feed Rate0.08-0.20 mm/tooth
Tooling RecommendationsStandard carbide end mills.

Expert Machining Tips

1

Same-day turnaround possible for simple parts

2

Excellent production representation

3

Standard stock widely available

4

As-machined finish is often sufficient

Common Parts Made

Gear prototypes

Bearing test articles

Mechanism validation

Fixture components

Machining Challenges

  • Cannot be painted — design for natural color
  • Moisture and temperature stability important

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