INSPECTION
- Home
- PRODUCTION LINE
- INSPECTION
INSPECTION
Quality Inspection
At TAJOW , our mission is to ensure the best outgoing quality for our customer. We adopt scientific and standardized inspection procedures to ensure all products are in precise dimensions, structural durability, appearance consistency and stable reliability of quality.
Inspection Process and Key Items
Throughout the hardware manufacturing process, we have established a comprehensive quality inspection system. From raw material incoming inspection, machining and surface finishing, to packaging and shipment, multiple inspection stages are set to ensure every product meets quality standards and customer expectations.
Inspection follows a strict quality control sequence:
IQC (Incoming Quality Control) → IPQC (In-Process Quality Control) → OQC (Outgoing Quality Control)
| Inspection Stage | Main Inspection Items | Description |
|---|---|---|
| Incoming Inspection | Material composition, surface finish, hardness | Check the composition and surface condition of raw materials such as brass, zinc alloy, and stainless steel. |
| Dimensional Inspection | Outer diameter, thickness, post length, thread specification | Use precision measuring tools or 3D scanners to control tolerance levels. |
| Appearance Inspection | Plating uniformity, color variation, scratches | Manual and microscopic inspection with color standard and reference samples. |
| Functional Testing | Snap strength, opening-closing durability, tensile strength | Simulate actual use and loading conditions to verify product lifespan. |
| Corrosion Resistance Test | Salt spray test, aging test | Conduct 24/48/72/96-hour tests as required by customer specifications. |
| Packaging Inspection | Quantity, labeling, compression resistance, anti-rust | Ensure packaging consistency, damage protection, and rust prevention. |
Inspection Instruments and Measuring Tools
We utilize a variety of precision instruments and measurement equipment covering dimensional accuracy, structural strength, surface quality, and coating performance to meet international standards.
Dimensions & Shape
- Vernier calipers
- Digital calipers
- Profile projector / optical comparator
- Magnifying microscope
- 3D scanner
Surface & Coating
- Color assessment cabinet
- Thickness gauge
- Gloss meter
- Industrial microscope
Material Properties
- Hardness tester
- Metal composition analyzer
- XRF(X-ray Fluorescence )
Functional & Environmental Tests
- Tensile strength tester
- Snap/closure force tester
- Salt spray testing machine
- Aging Test Equipment
Quality Documents, Standards & Records
In addition to physical testing, we emphasize quality documentation and process traceability. Every step of the production and inspection process is traceable and verifiable.
- QC inspection reports (per production) with sample retention for 2–3 years.
- Adopt AQL sampling standards and comply with customer-specific requirements (ROHS / REACH).
- Provide customized test reports (e.g., brand-specific salt spray duration or color deviation tolerance).