Peek cnc machining
We can achieve an accuracy of 0.005mm in Peek CNC machining. If you would like to learn more about peek machining case studies and pricing, please feel free to contact us.
What is peek cnc machining ?
PEEK is a semi-crystalline thermoplastic that is heat-resistant (can operate continuously at 260℃), has strong mechanical properties, is resistant to chemical corrosion, has good biocompatibility, and is also wear-resistant and radiation-resistant. Through milling using CNC machine tools according to G-code instructions, complex shapes can be manufactured with high precision, meeting the stringent requirements for dimensional accuracy and surface quality in fields such as medical and aerospace.
Types of peek for cnc machining
PEEK is a commonly used material in CNC machining. Its properties are modified by adding reinforcing agents or combining it with other materials. Specific classifications are as follows:
Pure PEEK
Unreinforced PEEK: High temperature resistance and chemical corrosion resistance; used in electronic insulation components, food processing parts, etc.
Glass Fiber Reinforced PEEK (PEEK-GF): Improved rigidity, strength, and heat resistance; used in automotive gears, oil screens, etc.
Carbon Fiber Reinforced PEEK (PEEK-CF): Higher strength, modulus, and wear resistance; used in aerospace and high-end automotive parts.
PEEK Composite Materials
PEEK-PI: Enhanced heat resistance and chemical corrosion resistance; used in deep-sea oil fields and nuclear power equipment components.
PEEK-PTFE: Improved self-lubricating properties; used in bearings, seals, and other low-friction components.
PEEK-PPS: Combines heat resistance, rigidity, and chemical stability; used in automotive engine covers and electronic components.
PEEK-PPSU: Improved toughness and impact resistance; used in medical devices and sports equipment components.
Specialty PEEK Materials
Medical-grade PEEK: Excellent biocompatibility, used in orthopedic instruments, artificial joints, etc.
Bearing-grade PEEK: Self-lubricating and highly wear-resistant, used in bearings, sliders, and other components.
Surface finish for cnc machining Peek parts
Based on over 15 years of CNC plastic machining experience, we have compiled the following list of surface finish processes used for various precision-machined parts made from peek material.
Machined finish
The prototype processed by the machine tool retains traces of tool machining.
Anodizing
Anodizing enhances the corrosion and wear resistance of metals and enables coloring and coating, suitable for metals such as aluminum, magnesium, and titanium.
Polish
Polishing enhances surface finish and aesthetic appeal, suitable for materials such as metals, ceramics, plastics, and PMMA.
Sand blasting
Sandblasting involves propelling abrasive material at high pressure or mechanically onto a workpiece to achieve a clean, roughened, and matte finish.
Brushed finish
Brushed finish creates a textured pattern on metal surfaces, enhancing aesthetic appeal. Suitable for aluminum, copper, stainless steel, and other materials.
Powder coating
Powder coating is applied to the workpiece surface via electrostatic adhesion, then cured at high temperatures to form a dense coating, enhancing the corrosion resistance of metal and plastic surfaces.
Electroplating finish
Metal plating is deposited onto material surfaces through electrolytic processes to enhance corrosion resistance and wear resistance. This technique is suitable for metals and certain plastics.
Black oxidize
A black oxide coating is formed on metal surfaces through chemical oxidation, offering low cost, a simple process, and reduced light reflection.
Electropolish
Removes microscopic protrusions from metal surfaces through electrochemical anodic dissolution, creating a smooth, dense surface free of residual stress and highly corrosion-resistant. Capable of processing complex metals and conductive materials.
Alodine
Forms a protective coating on surfaces through chemical conversion, enhancing corrosion resistance and adhesion. Environmentally friendly with excellent conductivity, suitable for aluminum and magnesium alloys.
Heat treatment
By altering the internal microstructure of metallic materials through heating, this process enhances hardness, strength, toughness, and wear resistance. It is suitable for metals such as steel, aluminum alloys, copper alloys, and titanium alloys.
Advantage of peek cnc machining
High Precision and Repeatability: Tolerances up to ±0.001 inches, suitable for demanding applications such as medical and aerospace, ensuring strong dimensional consistency in mass production.
Complex Structure Machining: Supports turning, milling, drilling, and other processes, enabling the manufacture of irregularly shaped parts (such as custom implants and stents) without molds.
Intact Performance Preservation: Mechanical cutting avoids thermal degradation, preserving PEEK’s high-temperature resistance (260°C), corrosion resistance, and high strength.
Flexibility and Low Cost: Small-batch production eliminates the need for molds, facilitating design modifications and shortening development cycles.
Surface Stability: Low creep and low water absorption (<0.5%), preventing deformation over long-term use, suitable for load-bearing or humid environments.
Applications of PEEK CNC Machining:
Medical: Temporary implants (skull plates, spinal fusion devices), surgical instruments, in vitro diagnostic equipment components.
Aerospace: High-temperature resistant stents, vacuum seals, lightweight gears/bearings.
Automotive: High-temperature resistant transmission gears, corrosion-resistant pumps and valves, fluid management system components.
Electronics and Semiconductors: Insulating stents, heat dissipation substrates, precision connectors. Industrial Energy: Corrosion-resistant pump bodies for chemical industry, downhole seals for oil wells, and wear-resistant casings.
FAQ of peek cnc machining
Is PEEK material suitable for CNC machining, and why?
PEEK is very suitable for CNC machining. It has high mechanical strength, high temperature resistance, chemical corrosion resistance, and dimensional stability. It is not easily deformed or burr-prone during machining, and its cutting performance is also good, ensuring high precision and high quality of parts.
What precautions should be taken during PEEK CNC machining?
Three points should be noted. First, use coolant or lubricant to cool the high-temperature chips to prevent material melting; second, take anti-static measures to avoid dust adsorption and affecting precision; third, pay attention to the clamping method to prevent part deformation and damage.
How should cutting tools be selected for PEEK CNC machining?
Select cutting tool materials with high hardness, wear resistance, and heat resistance, such as carbide tools. Select the tool type according to the shape of the part and machining requirements, such as end mills for milling planes and drills for drilling holes, and keep the cutting edge sharp.
How to improve the production efficiency of PEEK CNC machining?
Optimize the toolpath during programming, and plan it reasonably using CAM software; select appropriate cutting parameters, and experiment to find the best combination; batch machine similar parts; regularly maintain the equipment to keep it in good condition.
How to choose the right PEEK material for CNC machining?
Select the PEEK grade based on the part’s application environment and performance requirements, considering material purity and quality, supply availability, and cost-effectiveness. Consult with professional suppliers or processors for advice.
