PEEK CNC Machining: Properties and applications

Polyetheretherketone, commonly known as PEEK, is a high-performance thermoplastic material widely used in a number of industries because of its excellent mechanical, thermal, and chemical properties. Can PEEK be machined by CNC Machining?

Yes, it can be machined. PEEK is a popular choice for CNC machining for its unique properties especially its mechanical strength. In this blog, we will explore PEEK’s engineering properties and applications in CNC machining.

PEEK CNC Machined Parts

PEEK’s unique combination of properties makes it stand out from other thermoplastic materials.

Engineering Properties:

1. Excellent mechanical properties, such as high strength, stiffness, and creep resistance. It has a tensile strength of up to 100 MPa, a Young’s modulus of up to 3.6 GPa, and a compressive strength of up to 120 MPa. It also has excellent dimensional stability and low coefficient of friction, which makes it an ideal material for high-precision CNC machining.

2. Thermal resistance. PEEK can withstand temperatures up to 260°C without losing its mechanical properties. That makes it an ideal material for applications where high-temperature resistance is critical.

3. Chemical resistance: It is resistant to hydrolysis, meaning it can withstand exposure to water and steam without degradation. PEEK is also highly resistant to radiation and has low moisture absorption, making it an excellent choice for applications in harsh environments.

4. Dimensional stability: PEEK is highly resistant to changes in size or shape due to changes in temperature. This property makes it an excellent choice for applications where dimensional stability is critical, such as in aerospace or medical industries.


PEEK is used in a wide range of industries, including aerospace, automotive, medical, and electronics. Some of the common applications of PEEK in CNC machining include:

Aerospace components: It can withstand high temperature. Thus, its applications in aerospace include turbine engine parts, seals, and bearings.

Medical implants: Due to its biocompatibility and high strength, making it ideal for  medical applications such as spinal implants and dental implants.

Electrical components: Because of its excellent dielectric properties, PEEK is used to manufacture electrical components, including connectors, switches, and insulators, .

Automotive components: Due to its high-temperature resistance and mechanical strength, it is a popular material for creating automotive components, such as gears, bearings, and fuel system components.

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