Machining PSU/Polysulfone | Machined PSU/Polysulfone Parts | Penta Precision       +44 (0) 2392 668 334

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PSU (Polysulfone) Machining

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

What is PSU?

Polysulfone (PSU) is a family of transparent thermoplastics known for their toughness and stability at high temperatures. A semi-crystalline polymer, PSU is rigid and highly resistant to mineral acids, alkalis and electrolytes.

Main Attributes of PSU:

  • Good chemical resistance (mineral acids, alkali, salt solutions)
  • Flame retardant
  • High strength & stiffness
  • Excellent dimensional stability
  • Lubricated
  • High heat resistance
  • Broad temperature range capability
  • Good creep strength
  • Good resistance to hydrolysis and steam
  • High mechanical strength
  • Good insulating and dielectric properties
  • Semi-transparent
  • Typically has an amber tint
  • Food grade variations available
  • Not UV resistant and poor weatherability  – unsuitable for outdoor applications
  • Not suitable for esters, chlorine and aromatic hydrocarbons
  • Subject to stress cracking


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 PSU 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 PSU referred to as:

PSU Components, Applications & Industries

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

Typical Components & Applications:
  • Sterilisation cases and trays
  • Dental and surgical instruments
  • Medical devices
  • Aircraft interiors
  • Airline catering trolleys
  • Hot water fittings
  • Plumbing manifolds
  • Food service trays
  • Bearings
  • Precision gears
  • Connectors
  • Coil bodies
  • Flanges
      • Tubes
      • Pump components
      • Inspection windows
      • Instrumentation
      • Bushings
      Industry Examples:
      • Electronics
      • Medical technology
      • Mechanical engineering 
      • Food industry
      • Chemical
      • Automotive
      • Aerospace

      PSU Machining Service - PSU Milling & Turning

      Penta Precision provides highly accurate PSU machined parts. 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 PSU machining services: 

      • CNC milling – prototypes & large batch runs
      • CNC turning – prototypes & large batch runs
      • Insert installation
      • Part marking
      • Manual milling
      • Manual turning
      • Machining design advice
      • Machining drawing service

      Reasons to Choose Penta:

      • ISO 9001:2015 quality assurance
      • Consistent high quality machined parts
      • Reliable delivery dates - our track record speaks volumes
      • Exceptional customer service and communication
      • Machining design advice
      • Extensive experience in our field
      What Makes Penta Different?

      There are 3 key elements that run through the core of our company and staff at every level to ensure we deliver an exemplary service that goes above and beyond. We like to call these our 3 C's:

      • We Communicate well 
      • We take Care at each stage
      • Our service is Consistent

      See our ‘Proven Process’ page to find out more

      We are regularly machining PSU 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 PSU machining requirements, here's a list of ways to get in touch with us.

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

      “Penta have first class machinists, typical of tool room quality and  you get quick turn round from supplied drawings to finished parts, on all development or small repeat projects.'' Ian - Production Engineer 

      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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