ZH Precision Quality Assurance
At ZH Precision, quality is built into every stage of manufacturing. From material verification to final inspection, we combine advanced equipment, strict processes, and experienced engineers to ensure every part meets global standards.
Our Quality Objective:
Finished product pass rate ≥ 95%
On-time delivery rate ≥ 90%
Customer satisfaction ≥ 90
Our Quality Team
Our dedicated quality team manages full-lifecycle quality control across incoming material verification, in-process monitoring, and final inspection support. With over 10 years of industry experience, our team identifies and addresses potential quality risks early to prevent defects and maintain batch consistency.
We follow standardized workflows and strict inspection criteria to ensure consistent quality at every production stage. Our quality system undergoes regular internal and external audits to maintain system reliability. Equipped with testing equipment such as CMM and handheld spectrometers, we perform multi-stage inspections to verify dimensional accuracy, surface quality, and functional performance, ensuring all parts meet customer requirements.
Our Quality Control Steps
We rigorously control every step of production to ensure consistent quality, precise dimensions, and reliable performance. From engineering review to final inspection, each stage is carefully monitored and documented for full traceability and customer confidence.
Material & Design Review
Engineering review of 2D/3D drawings to confirm material selection, critical tolerances, surface requirements, and overall manufacturability before production begins.
First Article Inspection (FAI)
A first sample is fully inspected to validate all critical dimensions, GD&T features, and functional requirements before releasing batch production.
In-Process Quality Control
Key dimensions and critical features are monitored during machining through scheduled checks to maintain processing stability and reduce production deviation.
Dimensional & Surface Inspection
CMM systems and precision calibrated tools are used to verify dimensional accuracy, geometric tolerances, and surface finish per engineering specifications.
Final Inspection & Documentation
All parts undergo 100% manual visual inspection and dimensional verification before shipment. Complete inspection reports and batch traceability documents are provided for every order.
ISO Quality Management System
ZH Precision maintains ISO 9001:2015 and IATF 16949 certified quality management systems, implementing strict process control across all projects, including raw material traceability, APQP (Advanced Product Quality Planning), and standardized inspection procedures. This framework ensures stable, repeatable production quality for both custom parts and mass production.
Test Reports We Can Provide
ZH Precision provides standard inspection and test reports for CNC machining, sheet metal fabrication, aluminum extrusion, and die casting. Documents include CMM dimensional inspection reports, First Article Inspection (FAI) reports, material certificates and composition analysis, hardness and surface finish records, RoHS/REACH compliance certificates, and batch traceability reports. All reports are issued per order and are suitable for inspection, audit, and quality documentation.
Our List of Testing Equipment
Our full range of high-precision testing equipment guarantees every component meets strict dimensional tolerances and industrial quality standards. Our professional inspection lineup includes CMM, automatic image measuring instrument, gloss meter, colorimeter, film thickness gauge, micrometer, ring gauge, thread gauge, caliper and height gauge.
| Quantity | Equipment | Description / Purpose |
|---|---|---|
| 1 | 3.0 m Coordinate Measuring Machine (CMM) | For precise 3D dimensional measurement. |
| 1 | 2.5 m Coordinate Measuring Machine (CMM) | For medium-size parts dimensional inspection. |
| 1 | Digital Height Gauge | Accurate height and vertical dimension measurement. |
| 1 | Oxford Spectrometer (OES) | Optical emission spectrometer for metal composition analysis. |
| 1 | X-Ray Fluorescence (XRF) Analyzer for RoHS Compliance | Non-destructive elemental analysis to ensure RoHS standards. |
| 1 | Salt Spray Chamber | For corrosion resistance testing under controlled saline conditions. |
| 1 | Tensile Testing Machine / Universal Testing Machine (UTM) | Measures material tensile strength, elongation, and mechanical properties. |
| 3 | Colorimeters | For accurate color measurement and consistency verification. |
| 3 | Coating Thickness Gauges | Non-destructive measurement of paint or plating thickness. |
| 4 | Glossmeters | Measures surface gloss level for quality control of finishes. |
| 10 | Vernier Calipers | Precise linear measurement of internal, external, and depth dimensions. |
| 6 | Thread Gauges | Gear and thread profile measurement. |
| 6 | Radius Gauges | Measures radius or curvature of components. |
| 6 | Gauge Blocks (Slip Gauges) | High-precision length calibration and dimensional verification. |
| 4 | Pin Gauges | Inspect hole diameters and tolerances. |
| 4 | Smooth Ring Gauges | Inspect external diameters and fit accuracy. |
| 10 | Micrometers | Measure thickness or external dimensions with high precision. |