PEEK Milling
Pockets, holes, mounting faces, thin sections, and irregular profiles. The team reviews tool access and workholding against the drawing.
Engineering plastic machining
Custom PEEK & High-Performance Engineering Plastic CNC Machining
Custom PEEK milling and turning from your drawings for instrument, equipment and assembly components. Specify the PEEK grade, geometry, quantity and inspection requirements for a machining review.
Request a PEEK machining quote →The part comes first
From material requirement to machinable geometry.
Kangsenlong machines PEEK alongside POM, PVDF, PTFE, PPS, PP, and acrylic. We review the material requirement and part geometry together, rather than treating every plastic as interchangeable.
A useful drawing identifies the grade, functional surfaces, mating dimensions, threads, and features that matter in assembly. If the material is not yet selected, tell us about the operating environment so the team can discuss options with you.
Material grade, traceability documents, and any application-specific testing must be agreed before production. A machining capability does not by itself establish medical, food-contact, or other regulatory suitability.
Functional features
PEEK Milling, Turning and Inspection Requirements
PEEK Turning
Round parts, sleeves, connectors, and threaded geometry. Specify mating parts and the dimensions controlling the fit.
Inspection priorities
Define critical dimensions, surface requirements, and inspection records. Measurement methods and acceptance criteria are confirmed for each order.
Prepare a clear PEEK machining RFQ.
Send both a dimensioned drawing and a 3D model when available. Include the PEEK grade or approved specification, order quantity, any recurring demand, and the intended function of the component.
- Mark dimensions that affect sealing, alignment, or assembly.
- Identify surface finish, edge, thread, and cleanliness requirements.
- State whether material documentation or a dimensional report is required.
- Tell us about any post-machining work, assembly, or customer testing.
We review feasibility, machining route, and inspection scope before providing a project-specific quotation. Tolerances and delivery schedules are not assumed from a generic material page.
Overcoming the Challenges of Precision PEEK & Fluoropolymer Machining
Polyetheretherketone (PEEK) and fluoropolymers (PTFE, PVDF) offer exceptional chemical resistance, low outgassing, and mechanical stability for analytical and medical assemblies. However, their crystalline structure and low thermal conductivity make them notoriously prone to internal stress release, dimensional drift, and edge burring during standard CNC operations.
Our 4-Stage Process Control for Engineering Plastics
- 1. Certified Raw Stock & Lot Traceability: We source virgin, stress-relieved rod and plate stock with full lot traceability, supporting RoHS, REACH, FDA 21 CFR 177.2415, and USP Class VI compliant resin grades.
- 2. Intermediate Thermal Annealing: For thin-walled PEEK housings, deep-pocket manifolds, and asymmetric geometries, we perform rough machining followed by programmable oven annealing cycles to relieve residual internal stresses prior to final finish milling or turning.
- 3. Contamination-Free Cutting Environment: Medical and analytical polymers are machined with razor-sharp uncoated carbide or PCD (Polycrystalline Diamond) tooling using clean air-blast or deionized water-soluble cooling protocols—preventing hydrocarbon oil absorption.
- 4. Burr-Free Micro-Deburring & Vapor/Optical Finishing: Critical sealing lands, O-ring grooves, and fluidic ports undergo microscopic deburring and ultrasonic cleaning. For acrylic (PMMA) and polycarbonate (PC) fluidic blocks, we provide optical vapor polishing for clear visual flow inspection.
Engineering Plastic Capabilities & Tolerance Matrix
| Material Family | Common Grades Machined | Standard CNC Tolerance | High-Precision Tolerance | Typical Applications |
|---|---|---|---|---|
| PEEK | Natural 450G, GF30 (30% Glass), CA30 (30% Carbon), Bearing Grade | ±0.025 mm | ±0.010 mm | HPLC fittings, rotary valve rotors/stators, medical insulators, IVD structural mounts |
| PTFE / PVDF / PCTFE | Virgin PTFE, Glass-Filled PTFE, Kynar® PVDF, Kel-F® PCTFE | ±0.050 mm | ±0.020 mm | Aggressive reagent valve bodies, diaphragm seats, chemical seals, cryogenic seats |
| PEI (Ultem®) & PPS | Ultem 1000, Ultem 2300, Techtron® PPS | ±0.025 mm | ±0.012 mm | Autoclavable surgical trays, sterilization manifolds, high-voltage analytical insulators |
| PMMA / PC / POM-C | Cast Optical Acrylic, Lexan® PC, Delrin® / Acetal Copolymer | ±0.030 mm | ±0.015 mm | Visual fluidic manifolds, reagent reservoirs, low-friction guide bushings and gears |
Questions before you request a quote.
Do you machine PEEK from customer drawings?
Yes. PEEK is among the engineering plastics in our machining scope. Send the drawing, material grade, quantity, and required documentation for review.
Which PEEK grade should I specify?
Send the approved material grade or specification, including any filler requirements and documentation needs. If it has not been selected, describe the operating environment for discussion. Medical suitability and validation depend on the specific material and application requirements.
What tolerance can you achieve?
Tolerance capability depends on geometry, material specification, and measurement conditions. Mark the critical dimensions on your drawing so the team can assess them before quotation.
Drawing-based quotation
Let’s review your part.
Send a 2D drawing and 3D model, material grade, quantity, critical dimensions, and intended application. Quotation, inspection scope, and delivery schedule are confirmed for your project.
Send your drawing
WhatsApp: +86 18002516846Huafeng Technology Park, Shiyan Subdistrict, Bao’an District, Shenzhen, Guangdong, China