Plastic material guide
PEEK CNC Machining Service
PEEK selection depends on the resin grade, filler, load, temperature, chemicals and documentation. Unfilled, glass-filled and bearing formulations must not be substituted for one another.
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When PEEK fits — and when to pause.
High-temperature mechanical parts
Confirm the actual temperature, load and duration.
Chemical exposure
Check the named grade against the real media and concentration.
Regulated use
Medical, food or aerospace suitability requires the specific approved grade and traceability.
Use a complete material designation.
The following examples are common ways buyers describe the family. They are not a stock list and they do not authorise substitution.
- Unfilled PEEK by manufacturer gradeConfirm supplier grade, condition, stock form and required documentation.
- Glass-filled PEEK with percentage and gradeConfirm supplier grade, condition, stock form and required documentation.
- Carbon-filled or bearing grade with full designationConfirm supplier grade, condition, stock form and required documentation.
RFQ material line
PEEK · PEEK manufacturer grade, filler and stock form · stock form · quantity · required certificates · permitted substitutions.
If an application approval matters, name the regulation, edition and acceptance evidence.
Plan machining around the material behaviour.
Residual stress
Review stock annealing history, wall thickness and machining sequence.
Filled grades
Plan for abrasive reinforcement and different expansion behaviour.
Cleanliness
Define handling, packaging and documentation where needed.
Specify the final surface and dimensions.
As-machined
Define roughness, burrs and critical contact faces.
Lapping or polishing
Specify functional goal and measurable acceptance.
Marking
Confirm method, location and compatibility.
Separate material identity from dimensional inspection.
Purchase specification, supplier documents, lot traceability and an agreed identification or test method where appropriate.
Drawing, datums, critical characteristics, inspection conditions and the required report format.
Use the relevant tester only when the drawing defines the parameter, method, location and acceptance range.
Reference and quotation boundary.
External material reference: Victrex PEEK product guide ↗
The source supports general material context. It does not establish Prolean stock, achievable tolerances, certification scope, price or delivery for a specific part. Those are confirmed in the quotation.
Technical review updated October 2026.
PEEK machining questions.
How should PEEK be specified for machining?
State the complete PEEK manufacturer grade, filler and stock form, the stock form, permitted substitutions and required documents. Add the drawing, quantity, finish and inspection requirements.
Does a listed grade mean it is stocked?
No. The examples help structure an RFQ. Availability, substitutions, price and delivery are confirmed for the project.
How are tolerances confirmed?
Tolerances depend on geometry, material condition, feature size, quantity, finishing and inspection conditions. Mark critical dimensions and datums; the quote confirms what can be held.
Can material documents and inspection reports be supplied?
State the required certificate, traceability and dimensional or test report with the RFQ. The available document set and test method are confirmed before production.
Bring the drawing and material into one review.
Send the CAD model or drawing, quantity, material designation, service conditions, finish and acceptance requirements.
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- MaterialComplete grade, condition, stock form and documents.
- PartCritical dimensions, datums, finish and inspection.
- ProjectQuantity and requested delivery date.