Patrol cycle: every 2 hours
Patrol inspection runs on a two-hour cycle across all 19 machines, with recorded results. Any drift is caught inside the batch, not at the end of it.
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Metrology & inspectionInspection we do not subcontract.
Every measurement used to release your parts is taken in our own metrology room, on instruments whose calibration is traceable to national standards. The report you receive was produced by the people who made the part — so it matches the part.
01 — Inspection on the floor
Two shifts, four inspectors, no gaps
Each shift is covered by a dedicated patrol inspector and a dedicated CMM inspector. Night shift carries the same inspection cover as day shift — no production runs without inspection.
First-piece and last-piece
The first and last piece of every batch are verified in the metrology room, not at the machine. That brackets the whole run.
SPC at the machine
Production turned diameters are held at Cpk ≥ 1.33 under in-process SPC, then confirmed on the CMM before release.
02 — Instrument list
What measures your parts
| Instrument | Used for |
|---|---|
| Hexagon CMM — Explorer Scan 686, scanning type, commissioned 2026 | Full dimensional reports, circularity, cylindricity and form evaluation |
| Mitutoyo surface roughness tester — SJ-210 | Ra / Rz / Rmax · dedicated roughness instrument |
| Wilson contour / form measuring instrument — MMD-100 | 2D profile, radius, angle and step-height · dedicated contour instrument |
| Mitutoyo lever-type micrometers 0–25 mm and 25–50 mm | General dimensional checks |
| Mitutoyo spline micrometer 0–25 mm | Spline diameters, measured directly |
| Mitutoyo blade micrometer 0–25 mm | Narrow groove widths — retaining-ring and seal-ring grooves |
| Mitutoyo height gauge, 0–50.4 mm | Length, step height and groove position |
| Calibration | Traceable to national standards, CNAS-accredited — certificates on file with expiry dates |
03 — Metrology note
Why we measure it on that instrument
Small features are easy to measure badly. Choosing the right instrument for each feature is most of the work.
- The CMM is fitted with small-diameter ruby styli (Ø0.3 / Ø0.5 mm) for the small bores, cross-holes and threads typical of sliding-headstock work, and runs in scanning mode for contour and thread-form verification.
- Small radii (R ≤ 0.5 mm), chamfers and groove profiles go on the dedicated contour instrument, because a stylus form tracer resolves a small radius far better than a scanning CMM can.
- Roughness and contour are measured on two separate dedicated instruments rather than one combined unit, so each is used at its full rated range and resolution.
- Narrow groove widths and spline diameters are measured directly on blade and spline micrometers, not derived from CMM point-picking.
- Measurement uncertainty is stated on every first-article report and applied as a guard band before any feature is accepted against a ±0.005 mm limit.
Full first-article inspection
Issued in English, dimension by dimension, against your drawing balloon numbers.
EN 10204 3.1 material certification
Mill certificates supplied with every shipment, heat number to finished lot.
Records retained per lot
Inspection records kept against the lot and available on request.
ISO 9001 certified facility
Manufactured in-house at our ISO 9001 certified plant in Ningbo, China.
The bench, as it looks today
Metrology room & full-inspection area
04 — Documentation
Request a sample report →
Supplied with every order
Standard, not optional, and not billed as an extra.
- 01
Dimensional inspection reportCMM data on critical features.
- 02
First Article Inspection reportEvery drawing feature, ballooned and indexed to the drawing.
- 03
Material certificate EN 10204 3.1Mill test certificate, traceable from bar heat number to finished lot.
- 04
Surface roughness recordsMeasured values, Ra / Rz.
- 05
RoHS / REACH declarationIssued per shipment.
- 06
Inspection records retained per lotAvailable on request.
Want to audit the numbers first?
Ask for a sample first-article report and a blank inspection template before you send a drawing.