PEEK Machining Services

DEK's PEEK machining services cut unfilled, 30% glass-filled, 30% carbon-filled and bearing-grade PEEK into parts up to roughly 1000mm at ±0.005mm. No MOQ: one validation part or a full batch runs the same process, with prototypes in as fast as 3 days.

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±0.005mm
Tolerance Capability
3 days
Prototype Turnaround
No MOQ
Single Part to Batch

ISO 9001:2015 Certified AS9100D and ISO 13485 certified

Why Choose DEK for PEEK Machining Services

PEEK keeps high-temperature stability and chemical resistance where commodity plastics fail, which justifies its cost among our engineering plastics. DEK runs every order under ISO 9001, ISO 13485 and AS9100D, with IQC, IPQC, first article inspection, OQC, SPC and CAPA.

Every PEEK order gets CMM inspection with full dimensional traceability and ships with an inspection report against your drawing. With 1.2M+ parts machined annually, DEK also machines stainless steel hardware and tool steel fixtures in the same program.

ISO 9001, ISO 13485 and AS9100D certified
CMM inspection report with every order
20+ years in precision machining
98.6%+ on-time delivery rate

PEEK Grades We Machine

Grade selection drives both the machining approach and part performance. These are the PEEK grades we cut from stock to finished part.

Unfilled PEEK
Low moisture uptake
General-purpose parts needing chemical resistance. Unfilled stock machines the most predictably and holds the tightest practical tolerance.
Glass- / Carbon-Filled
30% glass or 30% carbon
Glass adds stiffness and dimensional stability under load; carbon adds wear resistance, stiffness-to-weight and electrical conductivity.
Bearing-Grade
Self-lubricating
Low-friction wear surfaces that run without added lubricant, and the natural choice for self-lubricating PEEK gears.

CNC milling cutter machining a PEEK plastic block

±0.005mm
Typical general tolerance
±0.003mm
Micro parts under 10mm
±0.01mm
Complex 5-axis profiles
~1000mm
Maximum part size

How PEEK CNC Machining Works at DEK

Milling and turning cut the polymer; grinding and EDM support fit-critical surfaces and fixturing, with tolerance bands set by grade.

1

CNC Milling

Pockets, bosses and complex 3D contours in filled or unfilled stock on CNC milling centers; complex 5-axis profiles hold to ±0.01mm.
2

CNC & Swiss Turning

Rotational parts by CNC turning; bar-fed Swiss turning controls deflection on micro-diameter components, held to ±0.003mm under 10mm.
3

Filled-Grade Tooling

Glass and carbon fibers abrade cutting edges, so we run diamond-coated tooling and slower feed rates to control the fiber-matrix interface and avoid delamination.
4

Grinding & Gear Cutting

Precision grinding finishes flat and cylindrical surfaces to fit-critical dimensions; gear cutting shapes low-friction PEEK gears. EDM makes fixtures only.

PEEK Machining Considerations

What our engineers weigh on grade, tolerance and batch size before a PEEK part goes to the machine.

1

Filled Grades & Tolerance

Fiber orientation affects how glass- and carbon-filled PEEK relaxes after cutting, so plan toward the loose end of the tolerance bands unless your application calls for tighter control.
2

Post-Machining Movement

Plastics move more than metal after cutting. Moisture equilibration and inspection at controlled ambient temperature make ±0.005mm repeatable rather than a one-off result.
3

Grade Drives Cost

Filled stock costs more than unfilled in both material and tool wear, so specify the reinforcement your load, wear or conductivity requirement actually needs.
4

Tolerance & Batch Size

Anything tighter than ±0.005mm adds inspection and cycle time, and prototype pricing differs from production. State grade, tolerance and batch size to speed up quote review.

When to Choose PEEK vs Delrin, PTFE or ABS

How PEEK compares with the engineering plastics buyers weigh it against most often. Full options sit under our plastic CNC machining materials.

Criteria	This MaterialPEEK	Delrin	PTFE	ABS
Choose it for	Structural parts	Low heat	Seals, liners	Low-cost parts
Heat	Highest	Lower	–	Lower
Chemicals	Broad range	Narrower	Most inert	–
Load, creep	Highest	Lower	Lower	Lower
Friction	Above PTFE	–	Lowest	–
Cost	Highest	Lower	–	A fraction

Where PEEK Machined Parts Are Used

PEEK goes where high-temperature stability and chemical resistance justify the material cost, from cabin interiors to process equipment.

Finishing Steps for PEEK Machined Parts

PEEK parts are supplied as CNC machining + a finishing step where fit-critical features need more control than the cut alone gives.

Finishing Steps

Precision grinding
Gear cutting
Moisture equilibration

Need a different finish on your PEEK part? Ask our engineers

PEEK Machining FAQs

Common questions from engineers and buyers sourcing machined PEEK parts.

Can PEEK be machined?

Yes. PEEK machines well on standard CNC milling and turning equipment, and DEK adds EDM for hard fixtures when a job needs it. Filled grades need controlled processing to avoid warping after machining.

Why is PEEK so expensive?

Raw PEEK resin costs far more than commodity plastics, and holding tight tolerances requires slower feed rates and more careful tooling than easier-to-cut materials. You pay for performance and precision, not markup.

Is PEEK stronger than Delrin?

Yes, in tensile strength, heat resistance and chemical resistance. Delrin is cheaper and easier to machine, so it is the better fit when your part doesn't need PEEK's temperature or chemical ceiling.

What are the disadvantages of PEEK?

High material cost, slower machining than commodity plastics, and filled grades that accelerate tool wear and need careful processing to avoid warping. That is why grade selection and an experienced shop matter more with PEEK than with easier materials.