PET Machined Parts & Properties | ISO 9001:2015 | Penta Precision       +44 (0) 2392 668 334

PET (Polyester) Machining, Properties & Components

What is PET?

Polyethylene terephthalate (PET) is a type of semi-aromatic Polyester. PET is a thermoplastic commonly known under the brand name Ertalyte®. It is a naturally colourless and semi-cristalline material.

The most widely used polyester, PET is readily available and relatively inexpensive.

It is a tough, dimensionally stable plastic that offers excellent wear resistance and mechanical strength. It is often reinforced with glass fibers or compounded with silicates or graphic in engineering applications to improve strength and rigidity.

Main Attributes of PET:

  • Relatively high density polyester
  • High strength
  • High hardness and rigity
  • Extremely high strength to weight ratio
  • Good creep resistance, even at elevated temperatures
  • Extremely low moisture absorption
  • Outstanding dimensional stability
  • Good temperature stability
  • Good dimensional stability
  • Good chemical resistance
  • Good adhesion and welding ability
  • Excellent wear resistance
  • Excellent stain resistance
  • Good electrical insulating properties
  • Good resistance to high energy radiation
  • Food (FDA) compliant
  • Very good heat and heat ageing resistance
  • Can be used at temperatures from -20 °C to +115 °C
  • Shatterproof
  • Recyclable


Simply complete our short form to receive your quotation.

Detailed information about PET 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 PET referred to as:

PET / Polyester Components, Applications & Industries

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

Typical Components & Applications:
  • Structural
  • Gears
  • Distribution valves
  • Friction strips
  • Dynamic seals
  • Bushes
  • Packaging machinery parts
  • Bearing
  • Rollers
  • Manifolds
  • Cases & covers
  • Switches
  • Insulation panes
  • Handles
  • Housings for appliances
  • Gears
Industry Examples:
  • Electronics
  • Medical
  • Automotive
  • Mechanical engineering
  • Food technology


    Glass Filled PET CNC Machined Prototype

    Glass Filled PET CNC Machined Prototype

    PET Machining Service

    Penta Precision provides the following PET plastic machining services: 

    Reasons to Choose Penta:

    We are regularly machining PET 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 PET machining requirements. 

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

    “Penta were excellent. The parts were exactly as specified and delivered on time. Penta also responded quickly to all our enquiries. I wouldn’t hesitate to recommend them.'' Greg - Research Scientist 

    Tel: +44 (0) 2392 668 334

    Fax: +44 (0) 2392 668 335

    Connect with us:

    Penta Precision Engineering Ltd

    Aspen House

    Airport Service Road



    PO3 5RA

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