Guides / Cost

What Drives the Price of a Machined PEEK Part

September 20, 2026

Sources: manufacturer datasheets and published standards. See editorial standards.

PEEK quotes surprise people who are used to aluminium. The part looks simple, the quantity is small and the number comes back several times higher than expected. Almost always the reason is in the material, not in the machining.

Here is where the money goes, in the order it usually matters.

1. The stock, and the block you start from

PEEK sells for many times the price of acetal or nylon per kilo, and filled grades cost more again. On a small machined part the stock is regularly the largest single line in the quote.

That makes the starting block the first thing to look at. A 60 mm cube machined out of a 70 mm plate throws away most of what you paid for. The same part cut from rod, or from plate sized closer to the part, can cut the quote noticeably even though the machining time is identical.

Practical steps:

• Ask whether the shop can buy stock closer to the finished size.
• Check whether rod works instead of plate for round parts.
• If you hold stock already, say so in the RFQ. Customer supplied material changes the quote structure completely.

2. How much you cut away

Machining time follows material removal, and on PEEK the removed material was expensive. A pocket that goes 2 mm deeper than it needs to costs twice: once in time, once in scrap.

This is worth a design pass. Removing a feature that forces a fourth setup, or relaxing a wall thickness that forces a stress relief cycle, changes the number more than negotiating the hourly rate.

3. Annealing steps

Extruded PEEK holds internal stress. Take material off one side and the part moves. On thin walls, deep pockets and tight bores, shops rough the part, put it in an oven, then finish it.

That is oven hours plus a second setup, and it is a real line in the quote. It is also the difference between a part that holds its bore and one that is out of tolerance a week later. See annealing PEEK parts for what the cycle looks like.

If your part has no thin sections and no critical bore, say so. It may not need the cycle at all.

4. Tooling wear on filled grades

Glass and carbon fibre chew through cutting edges. A shop quoting GF30 or CF30 prices in fresh tooling, and a careful one keeps separate tools so fibre dust never reaches unfilled medical work.

That is a real cost, and it is one reason a filled grade can be more expensive to machine even when the stock price is similar. If a filled grade is not doing anything for the part, switching to unfilled saves in two places. The grade comparison covers when the filler earns its keep.

5. Tolerance and surface finish

Each step tighter than you need adds passes, inspection and scrap risk. On PEEK the scrap cost stings more because the block was expensive.

General features around ±0.05 mm are routine. Getting to ±0.025 mm on small features needs annealed stock, a stable shop temperature and finishing passes. Tighter than that pushes into temperature controlled inspection, which not every shop has.

The cheapest change available to most buyers is to tolerance only the features that fit something and leave the rest at general tolerance.

6. Quantity

Setup spreads over the batch. Between one piece and ten, the price per part usually falls sharply. Between ten and a hundred, fixturing and program refinement keep pulling it down.

Ordering one at a time as need arises is the most expensive way to buy PEEK parts. If you know the annual number, ask for price breaks at that quantity and take a scheduled delivery.

7. Documents and packing

Lot certificates, biocompatibility documents, cleaning protocols, double bagging and cleanroom packing all add cost and a few days. None of them can be added after the fact, so ask at RFQ time.

For medical and semiconductor work this is often what separates two quotes that look different for no visible reason. One shop included the paperwork and the other did not.

A realistic way to compare quotes

Ask every shop for the same breakdown:

• Material and the stock size they plan to use
• Machining time and number of setups
• Annealing, if any
• Inspection and documents
• Packing

Two quotes that differ by 40% usually differ in stock size or in paperwork, not in hourly rate. Once you can see the lines, you can decide which parts of the price you actually want to buy.

This post is one section of our guide to custom PEEK parts, which also covers route, specification, paperwork and first parts.

If you want that comparison without chasing shops one by one, send the drawing and we match you with up to three shops that cut PEEK regularly.

Frequently asked questions

Keep reading

• Machined or Molded PEEK: Where the Volume Break-Even Sits
• How the PEEK Blank You Start From Changes the Part