Polyether Ether Ketone, commonly called PEEK, is a high-performance engineering thermoplastic that has been gaining popularity in manufacturing for its superior mechanical and thermal properties. It is a polymer that can rapidly replace metal parts in various industries such as aerospace, automotive, medical, and oil and gas. The ability to machine PEEK will allow for an injection of improved properties that other materials could not achieve. CNC machining is one of the most popular methods for manufacturing parts from PEEK.
In this blog, we’ll share everything you need to know about manufacturing parts with PEEK material using CNC machining.
What is PEEK?
PEEK is a semi-crystalline polymer that belongs to the family of high-performance thermoplastics. It has a high strength-to-weight ratio, excellent chemical resistance, resistance to wear and erosion, and exceptional electrical properties. PEEK has a melting point of around 340°C and can withstand continuous exposure to temperatures up to 260°C.
PEEK is mostly used as an alternative to metals in applications because it has exceptional properties that are not found in other materials. It provides a good combination of mechanical and thermal properties, making it a perfect fit in harsh environments.
Why CNC machining?
CNC machining is a manufacturing technique that produces precise and accurate parts for a wide range of applications. It involves using a computer-controlled machine to extract material from a workpiece, producing the desired shape, and size. The CNC machine ensures that the process is consistent, efficient, and accurate, resulting in high-quality parts.
CNC machining is one of the best ways to work with PEEK material. It allows for the production of customized and precise parts with tight tolerances, high surface finish, and complex geometries. CNC machines can also work with various types of PEEK like unfilled PEEK, PEEK with glass or carbon fiber, or PEEK with other fillers.
Benefits of PEEK Machining
There are countless benefits to using PEEK material in CNC machining. Here are a few:
1. High heat resistance – PEEK can withstand high temperatures without deforming, making it an ideal choice for high-temperature applications.
2. Lightweight – PEEK is a lightweight material that can be used to replace heavy metals for weight reduction.
3. Corrosion resistance – PEEK is resistant to a broad range of chemicals, including acids, bases, solvents, and gases.
4. Biocompatibility – PEEK is widely used in medical applications because it is biocompatible, meaning it does not harm living tissue.
5. High strength-to-weight ratio – PEEK has a high strength to weight ratio making it stronger than most metals in the same weight category.
6. Easy to machine – PEEK can be machined easily and quickly by CNC machining, which makes it a popular choice in different industrial applications.
Applications of PEEK CNC Machined Parts
PEEK CNC machined parts are utilized in many industries, where very high mechanical or thermal performance is required. Below are a few applications that CNC machined PEEK parts excel at:
1. Aerospace – PEEK is used in various components in aerospace, including seals, bearings, and gears, among others, that require high strength and low weight.
2. Medical – PEEK is biocompatible and used in several types of medical implants such as spinal implants, dental implants, and orthopedic implants.
3. Industrial – PEEK is used in various industrial applications such as food processing equipment, oil and gas equipment, and high-end automotive components.
4. Electrical – PEEK is an excellent insulator, and this makes it an ideal material for electronic components like connectors and cable insulation.
Challenges of PEEK Machining
While CNC machining is a very dependable and efficient method for machining PEEK, it comes with some challenges.
1. High wear on tools – PEEK is an abrasive material and can wear out machining tools quickly.
2. Polymer memory – PEEK has a polymer memory, which can lead to deformation if not handled correctly.
3. Limited penetration – PEEK is very hard and tough, making it challenging to drill or penetrate with sharp tools.
4. Processing entails care and expertise – Machine operators must understand how to work with the material in CNC machining.
Conclusion
PEEK material has revolutionized the manufacturing industry by providing a lightweight, high-performance alternative to metal parts. Its excellent mechanical and thermal properties make it an ideal choice for harsh environments. CNC machining of PEEK parts is a popular method for producing complex and precise shapes, leaving behind durable and long-lasting parts.
Though there are some challenges, proper handling of the material and use of effective tooling will lead to impressive results. Manufacturing PEEK parts with CNC machining is not only practical but cost-effective too. This material is a game changer when it comes to longevity, quality, and performance, making it a material of choice for many applications in different industries. If you are interested in machining PEEK parts, contact your local manufacturing professionals and discover how this thermoplastic can transform your projects.