Polyetheretherketone (PEEK) Plastic Machining Services

PEEK Plastic Machining

Often times due to the high performance applications of PEEK, parts are designed with precise tolerances and finishes. Polyether ether ketone (PEEK) is a colorless organic polymer thermoplastic used in engineering applications. This is very common in fluid applications such as seals and manifolds. Holding these tolerances and finishes requires a good knowledge of the machining characteristics of PEEK. Upland Fab has been machining all grades of PEEK for decades, giving us that experience to produce a quality part the first time. When machining the filled grades of PEEK , it is critical to properly manage the stresses in material, our engineers employ precisely controlled processes to control these stresses.


Machining PEEK 

For PEEK polyetheretherketone applications requiring strength and dimensional stability for continuous use up to 500°F, PEEK plastic is the perfect choice.  An additional application of PEEK is when good chemical resistance is required, often PEEK plastic is used in place of fluoropolymers when used at elevated temperatures. These properties are suited perfectly for use in the medical industryaerospace industrysemi-conductor, and oil and gas industries. PEEK materials can be purchased in sheet, rod, and tube formats with unfilled, 30% glass-fiber and 30% carbon fiber reinforced and bearing grade options.


PEEK Parts and CNC Technologies

Upland Fab employs the use of multi-axis machining when working with PEEK. This application of technology is critical to ensuring the parts are machined correctly the first time with minimal handling and fixturing. Often times even the most complex parts are completed in a single operation.

Upland Fab machines complex PEEK components directly from customer-supplied CAD models. Our DPD/MBD processes (Digital Product Definition, also referred to as Model-Based Definition) allow us to reduce manufacturing errors, which in turn allows us to produce PEEK parts at a very low cost. Have questions about our DPD process? Give us a call today at 909-986-6565 to discuss your next PEEK project.


Stay Up-To-Date On Your Project With Top-Flight Communication

At Upland Fab, communication is a top priority. By providing reliable, consistent communication to our customers, we are able to offer something that our competitors don’t: peace of mind. As an Upland Fab customer, you will work with a single point of contact who will keep you up-to-date on the progress of your project – every step of the way. Send us your project requirements today!


Other Materials We Work With

Are you looking for another material? We have the ability to machine many different materials take a look below at some of the other plastics we work with. 


  • Celazole®
  • Duratron®
  • PPS
  • Ketron®
  • Ryton®


Are you interested in taking a deeper look into which material you should be using? Contact us and we'll be happy to personally connect with you and discuss your application in more detail!


Discover the Upland Edge and Contact Us Today!

Upland Fab is an industry leader in PEEK machining. You’ll discover the reason why when you Contact Upland Fab to discuss your project. Or send us a Request for Quote on your next project!


Properties of PEEK Material

(compression molded and injection molded versions also available) updated 19 May 2008
ASTM or UL test Property Unfilled 30% Glass Fibers 30% Carbon Fibers Bearing Grade PEEK HT ™
D792 Density (lb/in³)
D570 Water Absorption, 24 hrs (%) 0.1 0.1 0.06 0.05 -
D638 Tensile Strength (psi) 16,000 15,000 19,000 11,000 11,000
D638 Tensile Modulus (psi) 500,000 900,000 1,100,000 850,000 500,000
D638 Tensile Elongation at Break (%) 20 3 5 2 20
D790 Flexural Strength of Peek (psi) 25,000 28,000 25,750 27,500 27,000
D790 Flexural Modulus (psi) 600,000 1,000,000 1,250,000 1,100,000 600,000
D695 Compressive Strength of Peek (psi) 20,000 26,000 29,000 26,700 20,000
D695 Compressive Modulus of Peek (psi) 500,000 1,000,000 - 1,000,000 -
D785 Hardness, Rockwell M100 (R126) M103 M102 M85 R108
D256 IZOD Impact Notched (ft-lb/in) 1 1.4 1 0.7 -
D696 Coefficient of Linear Thermal Expansion of Peek
(x 10-5 in./in./°F)
2.6 1.2 1 1.7 -
D648 Heat Deflection Temp (°F / °C)
at 264 psi
320 / 160 600 / 315 550 / 288 383 / 195 329/165
D3418 Melting Temp of Peek (°F / °C) 644 / 340 644 / 340 644 / 340 - 705/374
- Max Operating Temp of Peek (°F / °C) 480 / 249 480 / 249 500 / 260 482 / 250 - / -
C177 Thermal Conductivity of Peek
(x 10-4 cal/cm-sec-°C)





UL94 Flammability Rating of Peek V-0 V-0 V-0 V-0 V-0
D149 Dielectric Strength (V/mil) short time, 1/8" thick 480 500 32 - -
D150 Dielectric Constant at 1 MHz 3.3 3.7 - - -
D150 Dissipation Factor at 1 MHz 0.003 - - - 0.003
D257 Volume Resistivity (ohm-cm) at 50% RH of Peek 4.9 x 1016 5 x 1016 105 103 1016


Discover More About our Plastics and Composites Machining

We specialize in machining complex plastic and composite parts. Our plastics are used for a variety of industries, from aerospace to electronics to commercial applications. Our engineers are experts in plastics and will work with you to create the highest quality parts that meet your exact needs.

If you have questions about your project's unique needs and specifications, or want to request a CNC milling quote, please contact us to get in touch with one of our engineers today!

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Precision Plastic and Composite CNC Machining

Precision Plastic and Composite
CNC Machining since 1970.

Precision Plastic and Composite CNC Machining
©2023 Upland Fab - 1445 W Brooks Street, Unit L, Ontario, California 91762 - Phone: (909) 986-6565
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