0319-5628888
mr.suo@zrbearing.net
Zhongda (Hebei) Bearing attaches great importance to the quality control of raw materials and components, and strictly implements a full-process quality control system — from supplier access and physicochemical inspection to in-process control, finished-product testing and end-to-end traceability. Every bearing set undergoes rigorous quality verification, providing customers in 90+ countries and regions with a solid and reliable quality guarantee.
Raw materials are sourced from suppliers within the same system as SKF, under a strict supplier-access approval process. Supplier qualifications, production capacity and quality-assurance capability are comprehensively assessed with designated management, and every batch of raw material is rigorously screened.
Cooperation with SKF-system suppliers; comprehensive assessment of qualifications, production capacity and QA capability with designated management.
The corporate physicochemical laboratory analyzes chemical composition and physical properties of every batch, blocking non-conforming raw materials.
Metallographic microscopes examine microstructure to control intrinsic material quality, ensuring precision consistency and reliability from the source.
Multi-dimensional incoming inspection ensures the source foundation for running stability and service-life reliability.
The Production Part Approval Process (PPAP) is the core of advanced quality planning. Through complete submission and verification of the 19 requirements, it confirms the production process has correctly understood all engineering design and specification requirements, and continues to meet them consistently in actual production.
The 19 requirements of a PPAP submission:
Refined, whole-process quality control reduces manual intervention and enables integrated human-machine coordinated production.
Every stage carries traceability management and verification, achieving full-chain quality control from raw material to finished product.
The Z&R quality management system is a strategic decision of organizational structure, designed for specific bearing products and related processes — taking customer requirements as input, continuously monitoring customer satisfaction, and ensuring the organization has met customer needs.
Zhongda Bearing operates a provincial-level technology R&D center and has jointly established the "China-Serbia Shared Laboratory" with Belgrade, Serbia — built jointly across Hebei Linxi and Serbia, integrating advanced European technology resources with Chinese manufacturing capability to achieve efficient linkage of R&D, testing certification and achievement transformation, practicing the quality policy of "superior quality, superior service, zero defects, continuous improvement" in strict accordance with IATF 16949.
Precise analysis of chemical composition, metallographic structure and microstructure.
Comprehensive testing of dimensional accuracy, rotational accuracy and load capacity.
Accelerated life tests verifying service life under various operating conditions.
Reliability verification under high/low temperature, humidity, salt spray and vibration.
Strict testing standards from raw material to finished product ensure stable quality.
The laboratory is equipped with more than 300 high-end devices (sets), including Leica (Germany) microscopes and Hexagon (Sweden) coordinate measuring machines, with three professional testing rooms — metrology, physicochemical and testing labs — providing full-service metrology, physicochemical analysis, inspection and performance testing.
Precision device · Profile & geometric tolerance
Precision device · Dimensional accuracy
Precision device · Performance test rig
In 2019, Zhongda Bearing introduced SAP's ERP enterprise management system, linked with the workshop MES manufacturing execution system and SPC statistical process control — improving production-process controllability, synchronizing information and material flows, making workshop information transparent and visible, and building a more complete product quality traceability system.
Full digital management of orders, materials and supply chain, laying the foundation for OEM supply-chain upgrades.
Workshop execution control reduces line-side intervention and achieves efficient human-machine cooperation.
Real-time statistical analysis with instant alerts on abnormal variation keeps batch quality stable and controllable.
Transparent, visualized workshop information — quality data at any stage can be queried, verified and traced.
End-to-end data from raw-material batches to finished products supports OEM supply-chain system upgrades.
Choose Zhongda Bearing — every bearing set comes with verifiable quality records. Our QA team can provide product test reports, certification documentation and technical support.
