Quality & calibration
A tolerance claim without a measurement is marketing. Here is exactly what we measure, who measures it, and what we will and will not put our name to.
Every production batch is measured against four characteristics that decide whether a stylus is usable:
| Characteristic | Why it matters |
|---|---|
| Ball diameter deviation | Directly offsets every radius you measure |
| Sphericity (roundness) | Form error that no calibration offset can remove |
| Stem straightness | Cosine error on long and stepped styli |
| Thread go / no-go | Whether it seats square on the probe head |
Three levels of documentation
Most customers need the first one. Incoming inspection sometimes needs the second. Nobody needs the third until they are writing a PPAP.
Three pieces sampled per batch, measured at an accredited laboratory, report shipped in the box as a PDF. Covers ball diameter, sphericity, straightness and thread fit. No extra charge.
Every individual stylus measured and serialised. For incoming inspection that will not accept batch sampling. Quoted per piece, typically USD 12.
Custom geometry with drawing ballooning, measured values against each characteristic and material traceability. Quoted with the project.
Scope, stated plainly
This matters more than any certificate, because your auditor will ask.
Yes. Send us the specs you are considering and we will send the most recent batch report for those items, with the price list.
Reports from an accredited laboratory carrying the ILAC-MRA arrangement mark are accepted by most quality systems in North America, Europe and Asia. If your customer requires a specific accreditation body, tell us and we will confirm with the laboratory before quoting.
We do not operate a calibration service. For periodic re-verification we can introduce you to the laboratory we use, or work with the calibration provider your quality system already requires.
We replace it or refund it, and we pay the return freight. In six years of shipping we have had this happen — which is why the sampling protocol exists.