CNC Machining for PEEK Parts

PEEK parts are high-temperature engineering thermoplastics that maintain excellent flexural, impact, and tensile characteristics

Using PEEK materials (chemically known as polyetheretherketone) is ideal for a wide spectrum of CNC machining applications where thermal, chemical, and combustion properties are critical to performance. PEEK has a crucial capability of retaining its flexural and tensile properties at extremely high temperatures. It maintains those required properties when exposed to temperatures in excess of 482 degrees F. When glass fiber or carbon fiber reinforcements are added, that significantly enhances the mechanical and thermal properties of PEEK material.

Whether in a sheet, rod, tube, or film, PEEK material can be cut to size and used for a variety of CNC machining projects. These properties of PEEK make this a highly workable material:

  • Outstanding flexural, tensile, and impact characteristics
  • Substantial continuous working temperature
  • High continuous working temperature
  • High heat distortion temperature
  • Strong chemical resistance
  • Superior dielectric at high temperatures and frequencies
  • Exceptional radiation resistance
  • Excellent wear and abrasion resistance
  • Low emissions of smoke and toxic gas
  • Strong hydrolysis resistance

Machined PEEK Applications

Due to PEEK’s exceptional property profile, it is used in many critical areas throughout the generalized industry. PEEK materials are featured prominently within the automotive, medical, electronics, marine, nuclear, construction, transportation, sign and lighting, mining, manufacturing, pharmaceutical, earth moving equipment, energy and power, and aerospace fields.

PEEK materials have proven to be a highly popular plastics material throughout the industrial world, due to its proven resistance to wear, heat, and radiation, as well as its low levels of flammability, and low smoke and toxic gas emissions.

Using PEEK materials in CNC machining, either through CNC milling or CNC turning, is well-suited for fabricating specific parts used in demanding applications like:

  • Bearings
  • Thrust washers and seals
  • Piston parts
  • Semiconductor fabrication
  • Pumps
  • Compressor plate valves
  • Cable insulation
  • Ultra-high vacuum applications

PEEK materials offer designers and engineers the prospect of manufacturing parts that are lighter, stronger, and highly durable under harsh, high-temperature conditions.


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