Acetal Guide | Machining Design Considerations | Penta Precision       +44 (0) 2392 668 334

Acetal Machined Parts

A Guide to Acetal - CNC Milled & Turned Parts: Properties, Applications and Design Considerations

What is Acetal?

Acetal or POM (Polyoxymethylene) is an engineering plastic known for being amongst the strongest and stiffest of all thermoplastics.

There are two general types of Acetal resins available: Acetal Homopolymer and Acetal Copolymer.

Acetal homopolymer resins are made by the DuPont Company under the trade name Delrin®. Homopolymers are typically used in highly regulated industries.

Acetal copolymers are made by several companies. Slightly softer than Acetal homopolymers, the Acetal copolymers have a lower coefficient of friction.

Main Attributes of Acetal:

The two Acetal polymers do share many similar characteristics, however there are some significant differences which will determine which is most suitable for your application.

Acetal Copolymer: 


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Acetal Homopolyer:

Detailed information about Acetal for designers including UK stock sizes and technical properties can be found in the tabs below. Please note: this information is provided as a guide only. All information is based on our present knowledge and is given in good faith. No liability will be accepted by Penta Precision in respect of any action taken by any third party in reliance thereon.

Similar or obsolete designation and trade names

You may also see Acetal referred to as:

Acetal Components, Applications & Industries

Here are some examples of the industries and components for which Acetal is appropriate. This is by no means an exhaustive list. Please do get in touch if you are considering using Acetal and we can talk through your project with you.

Typical Components & Applications:
  • Electrical insulation
  • Medical applications
  • Food contact components (FDA compliant)
  • Gears
  • Bearings
  • Housings
  • Fasteners
  • Bushings
  • Handles
  • Seals
  • Valves
Industry Examples:
  • Food & packaging
  • Medical & pharmaceutical
  • Automative
  • Electrical/Electronic
  • Agriculture

Typically used in highly regulated industries such as:

  • Aerospace
  • Nuclear
  • Pharmaceutical


    Acetal Machined Part

    Black Acetal CNC Milled Part - Scientific

    Black Acetal CNC Machined Part - Scientific

    Black Acetal CNC Machined Part - Electronics

    Acetal Machining Service

    Penta Precision provides highly accurate machined parts in Acetal. Customers turn to us when they have had quality and delivery issues with their existing suppliers and need a reliable precision machining partner.

    Penta Precision provides the following Acetal plastic machining services: 

    Reasons to Choose Penta:

    We are regularly machining Acetal for customers all over the UK. Our customers depend on our machining expertise as well as our outstanding delivery performance, to machine the highest quality parts. Contact us to discuss how we can help you with your Acetal machining requirements. 

    Can we meet your
    Acetal machining needs?
    Call our engineering team on
    +44 (0) 23 9266 8334
    or contact us via our email form

    ''I am writing to acknowledge the receipt pallet press top plate. The parts fits our design specifications and I am very pleased with the overall quality of the part. I am looking forward to working with you again.'' Kasun - R&D Process Engineer

    Tel: +44 (0) 2392 668 334

    Fax: +44 (0) 2392 668 335

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    Penta Precision Engineering Ltd

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    Airport Service Road



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