Our Quality Control Process

We adhere to a rigorous, multi-stage quality control system to ensure every product—from auto supplies to bearings—meets international standards and customer expectations. Below is our systematic quality management framework:

1. Supplier Qualification & Inbound Material Inspection

• Strict Supplier Screening: All raw material suppliers (e.g., steel for bearings, fabrics for car cushions) must hold ISO 9001 or industry-specific certifications (e.g., IATF 16949 for auto parts). We conduct annual on-site audits to verify their production processes, quality records, and compliance with environmental standards.
• Material Inbound Checks: Upon receipt, raw materials undergo 100% batch testing. For bearings, key checks include:

• Chemical composition analysis of bearing steel (via spectrometers) to ensure hardness and durability.
• Dimensional accuracy of blanks (using calipers and coordinate measuring machines).
• For fabrics and accessories, tests for color fastness, tensile strength, and harmful substance content (per REACH/RoHS standards).

2. In-Process Quality Monitoring

• Real-Time Production Oversight: Each production line is equipped with quality inspectors who conduct hourly sampling checks. For critical processes:

• Bearing Manufacturing: During grinding and heat treatment, inspectors verify surface finish (using roughness testers) and metallurgical structure (via microscopes) to prevent cracks or deformation.
• Auto Supplies Assembly: For products like seat cushions, checks include stitching uniformity, hardware durability (e.g., zippers, buckles), and fit accuracy with standard vehicle models.
• Process Documentation: Every batch is tracked with a unique QR code, recording operator details, machine parameters, and inspection results for full traceability.

3. Finished Product Inspection

• Comprehensive Testing: All finished products undergo final inspection before packaging:

• Bearings: Tests include rotational accuracy (using dynamic balancing machines), noise level (in anechoic chambers), and load resistance (via fatigue testing equipment). AQL (Acceptable Quality Limit) standards are applied, with critical defects (e.g., dimensional errors) resulting in immediate rejection.
• Auto Supplies: Functional tests (e.g., seat cushion breathability, waterproof performance) and visual inspections (for defects like stains or uneven seams) are mandatory.
• Third-Party Validation: For bulk or high-value orders, we collaborate with SGS or Intertek to conduct independent audits, providing customers with certified test reports.

4. Packaging & Logistics Quality Control

• Protective Packaging: Products are packaged to withstand transportation stress. Bearings are sealed in moisture-proof bags with anti-rust oil; auto supplies use shock-absorbing materials to prevent damage during shipping.
• Pre-Shipment Checks: Before dispatch, randomly selected packages are inspected for correct labeling (including batch numbers, certifications, and safety instructions) and packaging integrity.

5. Post-Delivery & Continuous Improvement

• Customer Feedback Loop: We actively collect post-sales feedback and conduct root-cause analysis for any quality issues. For example, if a bearing fails in use, we trace the batch via its QR code to identify whether the issue stems from material, production, or handling.
• Process Optimization: Quarterly quality reviews are held to analyze inspection data, update testing standards, and train staff on new technologies (e.g., AI-powered visual inspection systems for faster defect detection).

Our commitment to quality is embedded in every step—from raw material selection to after-sales support—ensuring reliability, safety, and consistency for global customers.