PI/Polyimide Machining | PI Parts | Penta Precision


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PI / Polyimide Machining

A Guide to PI CNC Machined Parts: Properties, Applications and Design Considerations

What is PI?

Polyimides (PI or often referred to as the brand name Vespel®) are a family of some of the most heat and fire resistant polymers in existence. Low wear rates combined with the ability to work under unlubricated conditions and high pV-rates makes it the ideal material for challenging friction and wear applications, extending lifetime and reducing maintenance costs. 

There are many different grades of PI/Polyimide, all with varying characteristics. A comparison of the technical properties can be found in the tab below.

Main Attributes of PI:

  • High strength
  • Outstanding wear resistance
  • High dimensional stability, even up to 260°C
  • Long term thermal stability 300°C
  • Excellent thermal and electrical insulation
  • Good machinability
  • Flame retardant
  • Creep resistant
  • Good chemical resistance
  • Resistance to high energy radiation
  • Excellent machinability


Need a part machined by an experienced and reliable components manufacturer? Simply complete our short form to receive your no obligation quotation.

Detailed information about PI for designers can be found in the tabs below. Please note: this information is provided as a guide only.

PI Machining Service - Polyimide Milling & Turning

Penta Precision supplies highly accurate PI machined parts throughout the UK. Customers turn to us when they have had quality and delivery issues with their existing suppliers and need a reliable precision machining partner.

We communicate well with customers, we take care with the projects placed with us and we are consistent in our service delivery. See our Proven Process page to find out more about our winning formula.

"Penta Precision has provided excellent service to the company. They provide a friendly, professional and prompt service to our business's needs. Penta always meets our dimensioning requirements for bespoke products on time. I would recommend their service to anyone looking for machining." Matthew  - Process Engineer

Penta Precision provides the following PI machining services: 

Reasons to Choose Penta:

We are regularly machining PI 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. If you'd like to discuss how we can help you with your PI machining requirements, here's a list of ways to get in touch with us.

Want to know more about Penta?

Can we meet your
PI machining needs?
Call our engineering team on
023 9266 8334
or contact us via our email form

"Penta Precision are increasingly involved at an early stage of tooling design due to their extremely valuable technical assistance and guidance. Throughout our working relationship - dating back to 1999 - Penta Precision have been a faultless business partner. Product quality is excellent, pricing is competitive and deliveries are always on time. Reliability is a particular strength and is at the core of our business relationship. Our customers dictate demanding deadlines and Penta's flexibility and responsiveness have been crucial in helping us meet these requirements." Matthew - Senior R&D Engineer

Tel: 023 9266 8334

Fax: 023 9266 8335

Connect with us:

Penta Precision Engineering Ltd

Aspen House

Airport Service Road




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