PEEK CNC Machining Services

High-Precision Machining for Strong, Wear-Resistant & High-Temperature PEEK Parts
Custom Prototypes and Production with Advanced CNC Expertise

What is PEEK CNC Machining?

PEEK (polyether ether ketone) is a high-performance thermoplastic with outstanding strength, chemical resistance, and heat stability up to ~250 °C. With sharp carbide tools and rigid setups, it machines crisply for aerospace, semiconductor, oil & gas, and medical applications.

Tooling: Sharp micro-polished carbide; TiAlN/TiCN coatings for filled grades.
Heat control: Air blast or light mist—avoid local overheating and edge whitening.
Feeds/Speeds: Moderate SFM with consistent chip load; add a light finish pass on show faces.
Workholding: Rigid fixturing/soft jaws, short stick-out; minimize vibration on thin walls.

PEEK CNC machining with sharp carbide tooling and air blast

PEEK parts showing clean edges and dimensional stability

Key Considerations

Filled PEEK (CF/GF/mineral) is abrasive—reduce SFM, keep a steady feed, and use wear-resistant coatings. For tight stability on large or thin parts: rough → condition/anneal (as needed) → finish.

For edge quality, use climb milling and a fine step-over; deburr gently to avoid whitening and uneven chamfers.

Precision PEEK CNC Machining

3, 4, 5-Axis CNC Milling

Tight-tolerance pockets and contours. Balanced holders, sharp cutters, and controlled step-over deliver clean, uniform textures ready for assembly or finishing.

CNC Turning & Mill-Turn

Stable roundness and smooth OD/ID. Positive-rake inserts and steady feed reduce haze and burrs; keep a final sizing pass for critical diameters.

PEEK CNC Machining Capabilities

Standards	Detail
Max Part Size (X/Y/Z)	2300 × 1500 × 600mm
Minimum Feature Size	⊘1mm
Wall Thickness	0.25mm
Tolerance	+/-0.01
Surface Finish (as milled)	Ra0.5–Ra3.2
Standard Lead Time	3 working-days for rapid prototyping
Pricing Level	To be confirmed after design review
Type of Machine	Gantry CNC / 3-4-5-Axis CNC / Mill-Turn Compound CNC / Swiss-Type CNC / Turning Machine...etc...
Common Grades	Unfilled PEEK, Carbon-Filled 30%, Glass-Filled 30%, ESD / Conductive, Medical-Grade

Machinable PEEK Grades

Choose the balance of strength, wear, temperature, dielectric, and ESD/biocompatibility for your spec.

Unfilled PEEK Carbon-Filled 30% Glass-Filled 30% ESD / Conductive Medical-Grade

Unfilled PEEK

Excellent strength/toughness & chemical resistance
Good dielectric properties and dimensional stability
Great machined surface quality
Oil & gas, semiconductor, general structures

Moderate SFM with steady feed; use a finish pass on cosmetic faces and gentle deburr.

Carbon-filled PEEK structural bracket (3:2)

Carbon-Filled 30%

Higher strength/stiffness and wear resistance
Better thermal conductivity, lower deformation
Abrasive to tools—use wear-resistant coatings
Pumps, bearings, structural brackets

Lower SFM and keep firm feed; check edges frequently to maintain finish and tolerance.

Glass-filled PEEK housing and fixtures (3:2)

Glass-Filled 30%

Significantly higher stiffness & HDT
Abrasive—use coated carbide and rigid setups
Improved dimensional stability
Housings, fixtures, locating elements

Reduce speed and hold firmly; add a skim pass on cosmetic edges to unify texture.

ESD / Conductive PEEK

Static-safe fixtures, covers, trays
Fillers alter chip formation and edge behavior
Surface resistivity to spec
Excellent temperature stability

Tune feeds for sharp edges; confirm resistivity targets and cleaning/handling practices.

Medical-Grade PEEK

Biocompatible; sterilizable
Low moisture uptake; dimensional stability
Handles, guides, tooling fixtures
Process documentation & traceability

Follow cleanliness/traceability requirements; fine step-over and skim pass for cosmetic surfaces.

Display of Our PEEK CNC Machining Parts

CNC machined PEEK fixture component with excellent dimensional stability

PEEK CNC machined parts with exceptional mechanical strength and heat resistance

High-performance PEEK components produced by precision CNC milling

PEEK CNC prototype samples showcasing fine surface finish and tight tolerance

PEEK CNC turned bushing and insulator for aerospace and industrial applications

Material Machining Guide

PEEK CNC Machining: Selection, Process, and Quality Notes

PEEK is commonly considered for medical, aerospace, semiconductor, and high-temperature precision components. It is selected because of high temperature, chemical, and wear resistance. For CNC machining, the final result depends on material grade, toolpath strategy, tolerance allocation, surface finish, and inspection planning.

Good Fit

Use PEEK when the application benefits from high temperature, chemical, and wear resistance and the design can be machined with stable workholding.

Watch Points

Confirm wall thickness, hole depth, thread callouts, burr control, cosmetic surfaces, and finish buildup before production.

Quality Planning

Define critical dimensions, inspection method, tolerance class, and documentation requirements before the first article.

Topic	Practical Guidance for PEEK
Design review	Send 3D CAD, 2D drawings, material grade, finish notes, quantity, and critical-to-function dimensions.
Machining process	MTSPi can review whether milling, turning, drilling, tapping, boring, or a combined route is best for the geometry.
Surface finish	Plan cosmetic and functional finishing early, especially where coating thickness, polishing, or deburring affects fit.
Inspection	Use calipers, micrometers, gauges, CMM, or visual inspection based on tolerance risk and assembly function.

Related Material Choices

Compare PEEK With Nearby CNC Materials

ABSlow cost, impact resistance, and easy machining Acrylicoptical clarity and polished appearance Delrindimensional stability, low friction, and strong machinability Nylonwear resistance, toughness, and fatigue performance PPchemical resistance and low density HDPEtoughness, low friction, and chemical resistance PEimpact resistance and low moisture absorption PCimpact strength and transparency PEIheat resistance and dimensional stability ULTEMtemperature resistance and strength POMexcellent machinability and dimensional stability TECAFORMAHstable acetal performance and clean machining

FAQ

Is PEEK suitable for CNC machining?

Yes, PEEK can be CNC machined when the grade, geometry, tooling, workholding, and tolerance requirements are planned correctly.

What should I send for a PEEK machining quote?

Send CAD files, 2D drawings, quantity, material grade, finish requirements, tolerance notes, and any inspection or packaging needs.

Can PEEK parts be finished after machining?

Often yes. The right finish depends on the material family and part function. Confirm finish thickness and cosmetic expectations before machining.

How do I reduce cost on PEEK CNC parts?

Use practical tolerances, avoid unnecessary deep pockets or tiny holes, simplify setups, and reserve tight control for functional features.

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PEEK CNC Machining Services