A measured part is a known part. Here is how coordinate measuring fits into our process, why temperature matters, and what documentation you receive.
A coordinate measuring machine touches the part with a probe, records the exact position of many points, and fits geometry to them — a plane, a circle, a cylinder. From those fitted features it calculates size and geometric tolerances such as position, flatness and concentricity.
That matters because a caliper can confirm a diameter but cannot tell you whether a hole is in the right place relative to a datum. For anything with a position requirement, the CMM is the only honest answer.
Every material changes size with temperature — steel by roughly 12 µm per metre per °C, aluminum about twice that, and engineering plastics far more. If a part is measured hot, straight off the machine, the numbers describe a size the part will never be at rest.
That is why tight work is measured in a controlled environment, and why stress-sensitive parts such as machined PEEK are measured only after the material has fully relaxed. The measurement should describe the part as it will be in service, not as it was at the spindle.
Dimensional inspection reports, first article inspection reports where required, EN 10204 3.1 material certificates and full batch traceability — so the part can be traced back to its material and its inspection record. Downloadable evidence like this is what gets a supplier through a customer audit.
Our Zeiss CMM and material spectrometer are in-house, so dimensional and material verification do not wait on an outside lab and results come back inside the same production loop. When a dimension is marginal, that speed is what allows the process to be corrected before more parts are made.