Zhongda Bearing integrates green thinking across the whole process — casting, forming, machining and assembly. Built on the ISO 14001 environmental management system and powered by a digital smart factory, we keep building a modern, energy-saving and environment-friendly bearing manufacturing system.
Green development is our long-term strategy: environmental responsibility is built into the full product life cycle and every step of manufacturing, on a path that is high-end, intelligent and green.
Zhongda Bearing puts green development at the heart of manufacturing. The company fully operates an ISO 14001 environmental management system and applies ERP, MES and SPC digital systems to drive lean and clean production — saving energy, cutting consumption and controlling emissions through continuous technical and process improvement.
In the new project for 6 million sets of high-precision export bearing parts per year, environmental facilities and the main works are strictly designed, built and put into operation simultaneously (the "three simultaneities" rule) — planning a green factory from the source and exploring a sustainable path for bearing manufacturing.
Focused on long service life, low noise, high precision and light weight — extending the product life cycle and cutting material and energy use at the design stage.
The digital smart factory plans production leanly; automated equipment reduces manual intervention and material waste, making the process cleaner and more efficient.
Cutting fluid and water are recycled, residual heat is recovered, and metal materials are used efficiently — resources create more value inside a closed loop.
Energy and environmental management runs day-to-day under ISO 14001, with continuous energy-saving upgrades lowering consumption and emissions per unit.
Every step from rolling to packaging is fully controlled — energy saving, lower consumption and lower emissions are implemented in each stage of manufacturing.
Bearing ring stock is made of premium bearing steel and precision-rolled into regular tube blanks. Every batch passes multi-dimension incoming inspection in the physical & chemical laboratory. Rolling is dimension-controlled with stable surface quality, laying a solid foundation for final precision and service life from the very source.
Automated saws cut the steel pipe to length, and grinding steps square up blank faces and outlines. Sawing offcuts are collected and recycled; blank sizes stay consistent, giving casting, forging and stamping a uniform starting point and cutting material loss at the source.
Cast parts such as bearing housings are produced with standardized casting — batching, melting and pouring are controlled end to end. Raw materials come from suppliers of the same tier used by leading international brands and pass physical & chemical inspection on arrival, safeguarding quality and clean production from the source.
Bearing rings are forged automatically — medium-frequency induction heating, roll forging and robotic handling keep the metal flow lines complete and the structure dense. Induction heating is more efficient and faster than conventional furnaces, and dust collection plus acoustic enclosures improve the working environment.
Automated stamping lines form bearing housings and stamped units with precision, with robotic loading/unloading, safety light curtains and full guarding. Progressive and compound dies raise material utilization — "less or no cutting" forming reduces scrap and the energy of later machining.
CNC lathes machine bores, outer diameters and faces, with programmed control keeping tolerances stable and consistent. Centralized coolant circulation and oil-mist collection combine precision with lower energy use and a clean workshop.
Salt bath quenching delivers uniform heating and accurate temperature control, raising the hardness and wear resistance of bearing components; tempering then stabilizes the structure. The salt medium circulates in a closed loop with waste-heat recovery — better performance and greener manufacturing at once.
Seals are vulcanized to improve elasticity and aging resistance, ensuring reliable sealing and longer bearing life. Process parameters are precisely controlled, and the work area is fitted with exhaust gas collection and ventilation — product performance and environmental requirements are met together.
High-precision grinders finish raceways and other key surfaces to the micron level, while SPC statistical process control monitors critical dimensions in real time to keep precision consistent. Centralized grinding-fluid filtration forms a closed loop, supported by oil-mist collection and energy-saving equipment.
In a clean workshop, automated assembly and inspection cover washing, matching, grease filling, sealing and online testing — laser and automatic inspection equipment check every set, with AGV smart delivery. Measured grease filling avoids waste, and MES makes the whole process traceable.
Finished bearings receive anti-rust treatment and automated packaging — moisture-proof, shock-proof and fully labeled, keeping products intact over long storage and shipping. Packaging materials are eco-friendly and recyclable, reducing resource use across packaging and logistics.
Environmental facilities and the main works follow the "three simultaneities" rule; waste gas, wastewater, noise and hazardous waste are managed in full compliance so emissions stay within standards.
Dust-generating processes such as melting, forging and grinding are fitted with capture hoods and treatment facilities; waste gas is collected, treated and discharged within standards.
Wastewater pre-treatment facilities process production water for reuse, reducing fresh water intake and external discharge.
High-noise equipment is fitted with acoustic enclosures and vibration damping, keeping plant-boundary noise under control for an environment-friendly site.
Hazardous waste is sorted, stored and recorded in ledgers, then handled by licensed contractors — traceable throughout.
Note: Green performance data such as energy consumption per unit, emission reductions and clean-energy share will be compiled and published annually.
Zhongda Bearing will keep advancing capacity upgrades and green transformation — connecting the world with reliable support and sharing the value of sustainable development with customers and society.
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