--- description: Specializing in precise PEEK CNC Machining services, delivering high-quality solutions for diverse industrial applications with expert engineering precision. title: PEEK image: https://essengoldparts.com/wp-content/uploads/2024/05/PEEK-CNC-Machining.png --- [Skip to content](#content) # PEEK CNC Machining Services — Precision High-Performance Plastic Parts PEEK features metal-equivalent strength & max 250°C continuous temp, outstanding chemical resistance. Essengold custom machines unfilled/GF/CF/HPV PEEK for medical, aerospace, semiconductor & oil & gas, zero MOQ, detailed quote within 24h. * Tolerances down to ±0.005 mm on precision PEEK components * Unfilled / Glass / Carbon / HPV four full PEEK grades available * Continuous service temperature up to 250°C high resistance * 5–15 business day standard production lead time [ Request a Quote ](#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjYyMCIsInRvZ2dsZSI6ZmFsc2V9) [ Send Drawings ](mailto:sales@essengoldparts.com) ![PEEK CNC Machining](https://essengoldparts.com/wp-content/uploads/2024/05/PEEK-CNC-Machining.png) ## 10+ Years High-Performance Machining ## ±0.005 mm Ultra Precision Tolerance ## 4 Types Full PEEK Grade Options ## Up To 250℃ Continuous Temp ## Zero MOQ Single Prototype Accepted ## What Is PEEK? PEEK (Polyetheretherketone) is top-tier semi-crystalline high-performance thermoplastic with outstanding mechanical strength, extreme heat & chemical resistance, widely used where standard engineering plastics cannot meet harsh working requirements. ## Four Main PEEK Grades For CNC Machining ### Unfilled Natural PEEK Max chemical inertness & excellent biocompatibility, best electrical/optical property, lower rigidity than filled grades. Ideal for medical devices, semiconductor cleanroom parts & food-grade components. ### 30% Glass-Filled PEEK Improved stiffness & anti-creep performance, slightly reduced chemical & impact property. Suitable for high-load structural brackets & general industrial components. ### 30% Carbon-Filled PEEK Highest rigidity, minimum thermal expansion & superior wear resistance, conductive not for insulation use. Perfect for aerospace high-precision structural & bearing parts. ### PEEK-HPV Bearing Grade Compound with PTFE+carbon for ultra-low friction & outstanding abrasion resistance, customized for high-cycle dynamic thrust washers & sliding bushings. ## Core Benefits Of Using Machined PEEK ### Max 250°C Continuous Heat Stable mechanical property under long-term high temperature, repeatedly autoclave sterilizable for medical disposable parts. ### Metal-Like Strength-To-Weight Tensile up to 200MPa for carbon filled, lightweight alternative replacing aluminum for weight reduction design. ### Broad Chemical Resistance Resist most acid, alkali, oil & organic solvent under varying high-temperature working environments. ### Ultra Low Moisture Absorption Nearly no water intake, dimension stable in humid environment vs hygroscopic Nylon material. ### Excellent Wear & Fatigue Long service life for cyclic dynamic bearing & sealing components under repeated friction load. ### Medical Biocompatible Unfilled grade non-toxic, radiolucent without X-ray artifact for surgical instrument components. ## Thermal & Dimensional Critical Design Info Unfilled PEEK maintains mechanical performance up to 250°C for continuous service; HDT \~160°C under load; carbon-filled up to 300°C HDT. Low thermal expansion, especially in carbon-modified grades close to aluminum, greatly reduces assembly clearance issues with temperature changes. Unfilled PEEK withstand repeated 121\~134℃ autoclave cycles without deformation, a core advantage for reusable medical device components. **Design Tip:** Confirm the working temperature and sterilization requirements to select the correct PEEK grade during the quotation stage. ![Unfilled PEEK]() ## Our PEEK CNC Machining Capabilities ### Precision CNC Milling Multi-feature block parts, complex pockets & structural inserts from solid PEEK slab with optimized cutting parameters. ### CNC Turning Process Bushings, seal rings, valve stems & all cylindrical PEEK components with superior roundness precision. ### Drilling & Tapping High-strength PEEK thread, precision blind/through hole & counterbore processing without crack risk. ### 5-Axis Complex Machining Multi-angle undercut parts minimize repeated clamping to keep tight dimensional consistency. ### Prototype Single Machining Real PEEK raw material sample for thermal/mechanical performance verification test, no MOQ limit. ### Low-Mass Batch Production Consistent batch QC, full pre-shipment dimensional inspection & optional FA document. ## Typical CNC Machined PEEK Components ![Medical Instrument Parts peek]() ### Medical Instrument Parts Surgical handles, endoscopic fittings & sterilizable diagnostic equipment housings. ![Aerospace Structural Inserts PEEK]() ### Aerospace Structural Inserts Lightweight high-strength cabin hardware & fastener bushings replacing metal. ![Semiconductor Fixture PEEK]() ### Semiconductor Fixture Wafer carrier & cleanroom process chamber structural components. ![Oil&Gas Downhole Parts PEEK]() ### Oil&Gas Downhole Parts High temp backup rings & downhole valve seat components. ![Compressor Wear Rings PEEK]() ### Compressor Wear Rings Piston & thrust washer for hydraulic/pneumatic high-cycle equipment. ![High Temp Electrical Insulator PEEK]() ### High-Temp Electrical Insulator Connector housing & coil bobbin for extreme temperature equipment. ## Unfilled VS Carbon Filled PEEK Physical Data | Parameter | Unfilled PEEK | 30% Carbon Filled PEEK | | ----------------- | ------------- | ---------------------- | | Tensile Strength | \~100 MPa | \~200 MPa | | Continuous Temp | \~250°C | \~250°C | | Heat Deflection | \~160°C | \~300°C | | Thermal Expansion | 47µm/m℃ | 17µm/m℃ | | Density | 1.30g/cm³ | 1.44g/cm³ | ## PEEK VS PEI VS PTFE Comparison | Item | PEEK | PEI(Ultem) | PTFE(Teflon) | | -------------------- | ------------------ | -------------------- | ----------------- | | Max Continuous Temp | 250℃ | 170℃ | 260℃ | | Mechanical Strength | Very High | High | Low | | Chemical Resistance | Excellent | Good | Best | | Friction Coefficient | Medium | Medium | Ultra Low | | Flammability | Self-extinguish | V0 Grade | Non-flammable | | Core Application | Med/Aero High Load | Flame Retardant Elec | Seal Gasket Parts | ## Key PEEK Design Specifications ### Min Wall ≥1.5mm Minimum thickness for structural features, thin wall below 1.5mm only for non-load decorative part. ### Inner R≥0.5mm Avoid sharp inner corner stress concentration for cyclic loaded PEEK components. ### Economy Design Optimize raw material consumption to reduce high-cost PEEK machining expense. ### Grade Matching Unfilled for med/chem; CF/GF for high stiffness structural applications. ### Annealing Option Post annealing eliminate residual stress for ultra-precision tight tolerance parts. ### Assembly Clearance Reserve gap when mating with metal to offset thermal expansion difference. ## Tolerance & QC Standard General Tolerance: ±0.1 mm Precision Tolerance: Up to ±0.005 mm Low moisture absorption keeps dimensions stable long-term, full inspection before shipment, and FA available for bulk orders. ## Available Surface Finishes * **As-Machined:** Ra0.8\~3.2μm standard for most functional PEEK parts * **Precision Fine Cut:** Ra0.4\~0.8μm for sealing precision faces * **Mechanical Polish:** Ultra-smooth for high-demand dynamic sealing surfaces Standard paint/plating not suitable without special surface activation treatment. ## Main Application Industries ![Medical Devices]() ### Medical Devices Autoclavable surgical tool structural components & diagnostic fittings. ![Aerospace Industry]() ### Aerospace Industry Lightweight high-temperature cabin structural inserts & custom bushings. ![Semiconductor Equip]() ### Semiconductor Equip Cleanroom process chamber precision structural parts. ## How It Works - From CAD Drawing To Finished PEEK Parts ## 1 ### Upload Your CAD File Send us your STEP, IGES, or STL file along with material and quantity requirements. ![Upload Your CAD File]() 2 ### Get Detailed Quote Within 24H Engineer recommend proper PEEK grade & list cost + lead time. ![Get a Quote in Hours]() 3 ### Confirm All Spec Details Finalize grade, tolerance & post-processing requirement before cutting. ![Precision Machining]() 4 ### CNC Machining & Full QC Controlled cutting + optional annealing + full dimensional inspection. ![CNC Machining & Full QC]() 5 ### Global Shipment Standard 5\~15 working days delivery, urgent rush available. ![Fast Shipping Worldwide]() [ Upload File ](#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjYyMCIsInRvZ2dsZSI6ZmFsc2V9) ## Frequently Asked Questions #### Q: What is PEEK CNC machining? A: This is a process where plastic items are made to order by precisely cutting up Polyether Ether Ketone (PEEK) materials using Computer Numerical Control (CNC) machines. #### Q: What are some hints for producing plastic parts within narrow tolerances from PEEK? A: Among the helpful tips are employing the services of specialized PEEK machinists, selecting suitable grades depending on their intended application, using carbide or silicon carbide cutters, and ensuring proper cooling during machining so as not to build up stress which could cause deviation from required dimensions. #### Q: what are the advantages of using PEEK plastic for machining? A: The material exhibits excellent mechanical properties such as high strength and rigidity coupled with chemical inertness, making it suitable in the aerospace industry and automotive sector, among others, like medical implants where biocompatibility is highly demanded. #### Q: What types/grades of PEEK can be used in CNC machining? A: Medical grade, Industrial grade, Carbon fiber reinforced, etc., each having unique features that may be more advantageous than others depending on specific needs. #### Q: Why is PEEK considered a high-performance thermoplastic polymer? A: It possesses outstanding characteristics like lightness but is also stronger than other materials, thus having an excellent strength-to-weight ratio. Additionally, it has good resistance against heat distortion even under extreme conditions, together with a low coefficient of friction, hence making it very useful, especially when there’s a need for lubrication between moving parts. #### Q. Do you offer post-processing services? Yes. We provide bead blasting, polishing, painting, silk-screen printing, and ultrasonic welding. Specify your finish requirements when requesting a quote. #### Q. Can you work from a PDF drawing instead of a 3D model? We prefer 3D CAD files (STEP/IGES) for accurate quoting and machining. However, if you only have a 2D PDF drawing with dimensions, our engineering team can work from it — though turnaround may take slightly longer. #### Q. What quality inspections do you perform? Every batch undergoes dimensional inspection using CMM, calipers, micrometers, and optical comparators. We provide an inspection report upon request. ## Related services [ ](https://essengoldparts.com/cnc-plastic-machining-services/pei-ultem/) [PEI (Ultem)](https://essengoldparts.com/cnc-plastic-machining-services/pei-ultem/) China PEI (Ultem) Customized CNC Machining Services For all of your PEI (Ultem) CNC machining needs,... [ Read More ](https://essengoldparts.com/cnc-plastic-machining-services/pei-ultem/) [ ](https://essengoldparts.com/cnc-plastic-machining-services/pai-torlon/) [PAI (Torlon)](https://essengoldparts.com/cnc-plastic-machining-services/pai-torlon/) PAI (Torlon) CNC Machining Services From China Essengold Metal offers unmatched precision, advanced equipment,... [ Read More ](https://essengoldparts.com/cnc-plastic-machining-services/pai-torlon/) [ ](https://essengoldparts.com/cnc-plastic-machining-services/) [CNC Plastic Machining Services](https://essengoldparts.com/cnc-plastic-machining-services/) CNC Plastic Machining Services From China Precision-machined plastic parts for engineers and procurement... [ Read More ](https://essengoldparts.com/cnc-plastic-machining-services/) No posts found ## Request Custom PEEK Free Quotation Send CAD drawings & application parameters, get free grade recommendation & detailed quote within 24h, zero prototype MOQ, unit price start from $50. [ Submit Drawings For Quote ](#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjYyMCIsInRvZ2dsZSI6ZmFsc2V9) [WhatsApp: +86 180 5185 1336](https://api.whatsapp.com/send?phone=8618051851336) [Email: sales@essengoldparts.com](mailto:sales@essengold.com) * [Email](mailto:sales@essengoldparts.com) * [Whatsapp](https://api.whatsapp.com/send?phone=8618051851336) ### Get in touch with Us ！ Contact Form Demo Your Name \* Email Phone/Mobile Your Message Choose File Submit Form Please upload 3D and 2D files if available. If you cannot do so, please try compressing the files into a Zip or rar format before uploading. You can also email us at [sales@essengoldparts.com](mailto:sales@essengoldparts.com). ```json {"@context":"https://schema.org","@graph":[{"@type":"WebPage","@id":"https://essengoldparts.com/cnc-plastic-machining-services/peek/","url":"https://essengoldparts.com/cnc-plastic-machining-services/peek/","name":"PEEK - Essengold","isPartOf":{"@id":"https://essengoldparts.com/#website"},"primaryImageOfPage":{"@id":"https://essengoldparts.com/cnc-plastic-machining-services/peek/#primaryimage"},"image":{"@id":"https://essengoldparts.com/cnc-plastic-machining-services/peek/#primaryimage"},"thumbnailUrl":"https://essengoldparts.com/wp-content/uploads/2024/05/PEEK-CNC-Machining.png","datePublished":"2024-05-20T07:40:09+00:00","dateModified":"2026-06-15T13:24:34+00:00","description":"Specializing in precise PEEK CNC Machining services, delivering high-quality solutions for diverse industrial applications with expert engineering precision.","breadcrumb":{"@id":"https://essengoldparts.com/cnc-plastic-machining-services/peek/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https://essengoldparts.com/cnc-plastic-machining-services/peek/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https://essengoldparts.com/cnc-plastic-machining-services/peek/#primaryimage","url":"https://essengoldparts.com/wp-content/uploads/2024/05/PEEK-CNC-Machining.png","contentUrl":"https://essengoldparts.com/wp-content/uploads/2024/05/PEEK-CNC-Machining.png","width":600,"height":600,"caption":"PEEK CNC Machining"},{"@type":"BreadcrumbList","@id":"https://essengoldparts.com/cnc-plastic-machining-services/peek/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://essengoldparts.com/"},{"@type":"ListItem","position":2,"name":"CNC Plastic Machining Services","item":"https://essengoldparts.com/cnc-plastic-machining-services/"},{"@type":"ListItem","position":3,"name":"PEEK"}]},{"@type":"WebSite","@id":"https://essengoldparts.com/#website","url":"https://essengoldparts.com/","name":"Essengold","description":"China's top CNC Machining Services supplier","publisher":{"@id":"https://essengoldparts.com/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://essengoldparts.com/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https://essengoldparts.com/#organization","name":"Essengold","url":"https://essengoldparts.com/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https://essengoldparts.com/#/schema/logo/image/","url":"https://essengoldparts.com/wp-content/uploads/2024/05/logo.png","contentUrl":"https://essengoldparts.com/wp-content/uploads/2024/05/logo.png","width":600,"height":184,"caption":"Essengold"},"image":{"@id":"https://essengoldparts.com/#/schema/logo/image/"}}]} {"@context":"https:\/\/schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Q: What is PEEK CNC machining?","acceptedAnswer":{"@type":"Answer","text":"

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A: Among the helpful tips are employing the services of specialized PEEK machinists, selecting suitable grades depending on their intended application, using carbide or silicon carbide cutters, and ensuring proper cooling during machining so as not to build up stress which could cause deviation from required dimensions.<\/p>

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A: It possesses outstanding characteristics like lightness but is also stronger than other materials, thus having an excellent strength-to-weight ratio. Additionally, it has good resistance against heat distortion even under extreme conditions, together with a low coefficient of friction, hence making it very useful, especially when there\u2019s a need for lubrication between moving parts.<\/p>

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