PEEK CNC Machining
We provide high-precision PEEK CNC machining services for prototypes and small-batch production. As a high-performance engineering plastic, PEEK offers exceptional temperature resistance (up to 260°C), outstanding chemical resistance, and excellent mechanical strength.
- Tolerance up to ±0.002 mm
- Common Grades: Virgin PEEK, 30% Glass Filled, 30% Carbon Filled
- Lead time: 1–7 days for prototypes
- MOQ: 1 piece
Trusted by
industry leaders
Why Choose PEEK for CNC Machining?
At 6CNC, PEEK is one of our core high-performance plastic materials. It combines the advantages of metal strength with plastic lightness and corrosion resistance, making it an ideal replacement for metals in extreme environments.
Key Advantages
- Continuous operating temperature up to 260°C (short-term up to 300°C)
- Excellent mechanical strength, stiffness, and fatigue resistance
- Superior chemical and hydrolysis resistance
- Low friction coefficient and high wear resistance
- Biocompatible and sterilizable (medical grade)
- Excellent dimensional stability and low moisture absorption
- Low smoke and toxic gas emission when burned
- Good electrical insulation properties
Popular PEEK Grades We Machine
Virgin PEEK (Unfilled)
Best chemical resistance and ductility. Ideal for medical, food processing, semiconductor, and analytical instruments.
30% Glass Fiber Reinforced PEEK (PEEK GF30)
Significantly improved stiffness and dimensional stability. Suitable for structural components and automotive parts under high temperature.
30% Carbon Fiber Reinforced PEEK (PEEK CF30)
Highest strength, rigidity, and wear resistance. Commonly used in aerospace, oil & gas, and high-load mechanical parts.
| Grade | Strength | Stiffness | Temp. Resistance | Key Features | Typical Applications |
|---|---|---|---|---|---|
| Virgin PEEK | Good | Good | 260°C | Best chemical resistance | Medical, Food, Semiconductor |
| PEEK GF30 | High | Very High | 260°C | High stiffness | Structural, Automotive |
| PEEK CF30 | Very High | Extremely High | 260°C | Max strength & wear resistance | Aerospace, Oil & Gas, Bearings |
Surface Finishes & Post-Processing
We offer a full range of surface finishing and post-processing options for PEEK parts to meet your requirements for dimensional accuracy, appearance, performance, and cleanliness.
As Machined
The most common and cost-effective finish. Parts come directly from the CNC machine with excellent dimensional accuracy. Typical surface roughness Ra 1.6–3.2 µm. Ideal for functional components where appearance is not critical. With optimized parameters, we can achieve finer finishes up to Ra 0.8–1.6 µm.
Bead Blasting / Sandblasting
Produces a uniform, matte, non-reflective surface. Effectively removes tool marks, burrs, and minor surface imperfections while creating a consistent texture. Often used as a pre-treatment before other finishes or for parts that require a non-slip or aesthetic matte look.
Vapor Polishing
A chemical vapor process that softens and smooths the surface for an extremely smooth, glossy finish on suitable geometries. Note: Due to PEEK’s high chemical resistance, vapor polishing effectiveness is limited compared to other plastics (e.g., PC or Acrylic). Mechanical polishing is usually preferred for best results.
Annealing (Stress-Relief Heat Treatment)
Highly recommended for precision PEEK parts. Annealing relieves internal stresses caused by machining, increases crystallinity, minimizes the risk of warping or cracking, and improves long-term dimensional stability.
Polishing
Achieve high-gloss mirror finish or elegant We provide mechanical polishing to achieve high-gloss or near-mirror surfaces (Ra as low as 0.2–0.4 µm). Particularly important for medical devices, optical components, sealing surfaces, and visible parts. Multi-stage polishing processes are available for critical applications.
Laser Marking / Engraving
Permanent, high-contrast part marking without affecting surface integrity. Ideal for traceability, serial numbers, logos, or compliance markings on medical and aerospace parts.
6CNC PEEK Machining Capabilities
- 3-axis, 4-axis, and 5-axis CNC milling
- CNC turning and mill-turn composite machining
- Professional programming optimized for high-performance plastics
- Tight tolerance as precise as ±0.002 mm
- Stress-relief annealing service
- Strict quality control with CMM inspection reports
- Material traceability and clean room packaging available
Main Applications
Our precision PEEK parts are widely used in:
- Medical & Healthcare (surgical instruments, implants, dental devices)
- Aerospace & Defense
- Oil & Gas / Petrochemical industry
- Semiconductor & Electronics
- Automotive (high-temperature sensors, seals)
- Food Processing & Packaging equipment
- Industrial Automation & Robotics
Why Choose 6CNC for PEEK Projects?
- 10+ years of experience in high-performance plastic machining
- 140+ advanced CNC machines
- Expert DFM feedback specifically for PEEK to avoid deformation and stress issues
- Strict quality control and full inspection reports
- One-stop service: material sourcing + machining + annealing + finishing
- Fast response and reliable delivery for time-sensitive projects
We understand the critical requirements of PEEK components and help engineers and companies reduce development risk while achieving high performance.
