PEEK (Polyether Ether Ketone)

What PEEK is

Premium high-performance thermoplastic with excellent mechanical properties at elevated temperatures.

Why engineers specify it

PEEK is expensive, and that is the whole design conversation. It gets specified when the service temperature or the chemistry rules out the alternatives — the parts that would otherwise be metal, or would otherwise fail. If the environment is mild, something cheaper will do the job.

Machining PEEK

PEEK machines well but is unforgiving of heat build-up, and stock shape matters — sharp tooling, steady chip clearance and stress relief between roughing and finishing all pay for themselves on close-tolerance work.