PEEK Deburring

Cryogenic Deburring CNC Machined PEEK Parts


Deburring PEEK Parts

Machining PEEK

PEEK, Polyetheretherketone, is a high-performance thermoplastic known for its excellent mechanical and chemical properties. It’s often used in various industries, including aerospace, automotive, medical, and electronics.

When machining PEEK plastic, here are some general considerations:

  1. Tool Selection: PEEK is a tough material, so selecting appropriate tools is essential. Carbide or high-speed steel tools with sharp cutting edges are commonly used.
  2. Cooling and Lubrication: This material generates heat during machining, so using coolants or lubricants can help dissipate heat and prevent damage to the material and tools.
  3. Cutting Speed and Feed Rate: Optimizing the cutting speed and feed rate is crucial for achieving efficient machining. The specific values depend on factors like tooling, machine capabilities, and the desired surface finish.
  4. Rigidity: Ensuring rigidity in the machining setup is important to minimize vibrations and maintain dimensional accuracy. Proper clamping or fixturing techniques are necessary.
  5. Chip Control: PEEK can produce long, stringy chips. Using chip breakers or coolant can help control chip formation and prevent chip entanglement around the cutting tool.
  6. Post-Machining: Since it has excellent dimensional stability, so minimal post-machining shrinkage occurs. However, surface finishes may require additional steps such as polishing or sanding.

It’s worth noting that the specific machining techniques and parameters can vary based on the type and grade of PEEK being used, as well as the machining equipment available. It’s always recommended to refer to the manufacturer’s guidelines or consult with experts experienced in machining PEEK plastic for precise instructions.


PEEK plastic is commonly used in various industries for its excellent mechanical, thermal, and chemical properties. Some examples of machined parts made from PEEK include:

  1. Aerospace Components: PEEK is utilized in aerospace applications, such as aircraft interiors, engine components, seals, bushings, brackets, and structural parts. Machined PEEK parts may include airframe components, electrical connectors, or bearings.
  2. Medical Implants: Since it is biocompatible, making it suitable for medical implants. Machined PEEK parts can be found in orthopedic implants, spinal implants, dental devices, and prosthetics.
  3. Seals and Gaskets: This material’s excellent chemical resistance and high-temperature stability make it ideal for seals and gaskets in various industries, including oil and gas, automotive, and manufacturing equipment.
  4. Electrical Insulators: It’s high dielectric strength and thermal stability make it suitable for electrical insulation applications. Machined PEEK parts can be used in connectors, insulating washers, coil forms, and electrical housings.
  5. Semiconductor Equipment: PEEK’s low particle generation and high-temperature resistance are advantageous in the semiconductor industry. Machined PEEK parts can be found in wafer handling components, probe cards, and chamber parts.
  6. Bearings and Bushings: It has a low coefficient of friction and wear resistance make it suitable for bearings and bushings in various applications, including automotive, industrial machinery, and marine equipment.
  7. Pump and Valve Components: PEEK’s chemical resistance and dimensional stability are beneficial for pump and valve applications. Machined PEEK parts can be used in impellers, seals, valve seats, and wear rings.

These examples illustrate the diverse range of applications where machined PEEK parts can be found. The specific design and functionality of the parts can vary widely based on the requirements of the industry and application in question.

Cryogenic Deburring PEEK Material

Cryogenic deburring is a process that involves exposing the parts to extremely low temperatures, typically using liquid nitrogen. The cold temperature causes the burrs to become brittle, making them easier to remove via mechanical means.

Here’s an overview of the cryogenic deburring process for PEEK machined parts:

  1. Preparation: The machined PEEK parts are cleaned and inspected to identify any burrs or sharp edges that need to be removed.
  2. Burr Removal: The parts are placed in a controlled environment, usually a cryogenic deburring machine. The extreme cold temperature causes the burrs on the PEEK parts to become brittle. Mechanical methods, such as tumbling, blasting, are then used to break off the brittle burrs without damaging the underlying material.
  3. Inspection: After cryogenic deburring, the parts are inspected to ensure that all burrs and sharp edges have been successfully removed. Any remaining burrs may require additional deburring or alternative methods.

Cryogenic deburring is effective for PEEK parts because it minimizes the risk of thermal damage to the material, which could occur with traditional methods involving high temperatures or harsh chemicals. It provides a controlled and precise deburring process while maintaining the integrity of the PEEK material.

It’s important to note that the specific deburring method may depend on the complexity of the parts, the nature of the burrs, and the desired surface finish. Consulting with a deburring specialist or service provider experienced in working with PEEK materials, such as Nitrofreeze Cryogenic Solutions, can help determine the most suitable deburring approach for your specific application.

Want to send in your machined PEEK parts for a no-charge deburring evaluation? Learn more by calling us at (508) 459-7447×105 or email us at