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.
For applications requiring strength and dimensional stability for continuous use up to 500°F PEEK is the plastic of choice. An additional application of PEEK is when good chemical resistance is required, often times PEEK is used in place of fluoropolymers when used at elevated temperatures. These properties lend itself to uses in the medical, aerospace, semi-conductor, and oil and gas industries. PEEK can be purchased in sheet, rod, and tube in unfilled, 30% glass-fiber and 30% carbon fiber reinforced and bearing grade.
Using CNC Technologies for Machining PEEK Parts
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 allow us to reduce manufacturing errors, which in turn allows us to produce PEEK parts at a very low cost.
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Properties of PEEK Material
|TYPICAL PROPERTIES of EXTRUDED PEEK
(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 ™|
|PHYSICAL PROPERTIES OF EXTRUDED PEEK|
|D570||Water Absorption, 24 hrs (%)||0.1||0.1||0.06||0.05||-|
|MECHANICAL PROPERTIES OF EXTRUDED PEEK|
|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||-|
|THERMAL PROPERTIES OF EXTRUDED PEEK|
|D696||Coefficient of Linear Thermal Expansion of Peek
(x 10-5 in./in./°F)
|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|
|ELECTRICAL PROPERTIES OF EXTRUDED PEEK|
|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|