PEEK (POLYETHERETHERKETONE) – BEARING GRADE
Material Information
PEEK is a high performance thermoplastic that is tough, strong, rigid, and creep resistant. It offers excellent thermal, chemical, and hydrolysis resistance as well as excellent resistance to abrasion and dynamic fatigue. Its ability to run at high continuous temperature (480º F) without permanent property loss and stable electrical properties makes PEEK a good alternative to fluoropolymers in hostile environments. PEEK has also been shown to exhibit very low smoke and toxic gas emission when exposed to flame. PEEK is available in unfilled, 30% glass filled, 30% carbon filled, and bearing grade (Ketron HPV).
Bearing Grade PEEK has been reinforced with carbon fibers with graphite and PTFE lubricants. It offers the lowest coefficient of friction, and the best machinability of the PEEK grades. In addition to its low coefficient of friction, it also is low wear, high limiting PV, and has low mating part wear. Bearing Grade PEEK is available in sheet or rod in a black or dark grey color.
Application
- Aircraft components
- Wire and cable coatings
- Automotive engine parts
- Tearings
- Woven monofilament
- Film
- Microwave applications
- Pump and valve parts
- Chemical processing
- Electrical components and electronics
- Semiconductor production
- Industrial applications
Properties
- Superior heat resistance and high temperature performance
- High mechanical and electrical properties over wide range of temperatures
- Outstanding chemical resistance
- Resistance to high pressure steam
- Resistance to gamma radiation
- Very low moisture absorption
- Good wear and abrasion resistance
- Low smoke and toxic gas emission
- Excellent flame retardance
- Easy to fabricate
Physical |
Astm Test Method |
PEEK (Bearing Grade) |
| Density (lb/in^3) | D792 | 0.052 |
| Specific Gravity | D792 | 1.44 |
| Water Absorption @ 24 hours (%) | D570 | 0.05 |
Mechanical |
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| Tensile Strength (PSI) | D638 | 11,000 |
| Tensile Modulus (PSI) | D638 | 850,000 |
| Tensile Elongation at Break (%) | D638 | 2 |
| Flexural Strength (PSI) | D790 | 27,500 |
| Flexural Modulus (PSI) | D790 | 1,100,000 |
| Compressive Strength (PSI) | D695 | 26,700 |
| Compressive Modulus (PSI) | D695 | 1,000,000 |
| Izod Impact (Notched), ft-lb/in | D256 | 0.7 |
| Rockwell Hardness | D785 | M85 |
Thermal |
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| Coefficient of Thermal Expansion, 10^-5/°F |
D696 | 1.7 |
| Heat Deflection Temperature 264 psi, ºF | D648 | 383 |
| Melting Point, °F | D3418 | – |
| Continous Service Temp (Operating), °F | – | 482 |
| Thermal Conductivity, BTU-in/hr-ft² °F | C177 | 1.7 |
| Flammability Rating | UL94 | VO |
Electrical |
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| Dielectric Strength, Short Term, (Volts/Mil) @ .125″ Thick |
D149 | – |
| Volume Resistivity (ohm-cm) @ 50% RH | D257 | 10^3 |
| Dielectric Constant at 1 MHz | D150 | – |
| Dissipation Factor at 1 MHz | D150 | – |
NOTE:
The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.