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Quality
Quality control and inspection
Sierxi runs an ISO 9001:2015 quality system. Parts are checked against the drawing on a vision measuring system at first article and on every lot, with AQL sampling plus automated 100% inspection on critical features. Every shipment can include a dimensional report and material certificates (mill test certificates).
Capabilities at a glance
| Quality system | ISO 9001:2015 |
|---|---|
| Vision measuring | 400 × 300 × 250 mm, accuracy (2.5 + L/200) μm |
| Sampling | AQL sampling on every lot |
| 100% inspection | Automated optical inspection on critical features |
| Gauges | Micrometers, height gauges, JIS 6H thread gauges, push-pull gauges |
| Coated parts | Coverage, coating thickness and cross-hatch adhesion checked on return from finishing |
| Reports | Dimensional report and material certificates per shipment |
Inspection at three points
- Incoming: material grade, thickness and coating checked on arrival
- First article: full dimensional check on the vision measuring system before release
- Lot inspection: AQL sampling plus automated 100% checks on critical features before packing
Certification
We are certified to ISO 9001:2015. We do not hold IATF 16949 and do not supply automotive production parts.
Related pages
Factory
Our factory and equipment
The Sierxi factory in Suzhou: 3,000 m², 13 stamping presses, 6 CNC spring machines, 5 laser welders, laser cutting, CNC bending, injection molding.
Engineering guide
JIS B 0408 general tolerances for pressed metal parts
JIS B 0408 general dimensional tolerances for blanked and bent/drawn metal press parts, grades A, B and C, and how to call them out on drawings.