Haimen City Mingzhu Steel Ball Co., Ltd.

Haimen City Mingzhu Steel Ball Co., Ltd. is a reliable and professional manufacturer specializing in the research, development and production of high-precision steel balls in China. Founded in 1992, the company is strategically located in Haimen, Jiangsu Province, enjoying superior geographical transportation conditions and convenient logistics support for domestic and foreign trade. The company’s production base covers a total area of 7,500 square meters, with standardized production workshops, independent inspection rooms and complete supporting facilities. At present, we are equipped with 105 sets of advanced professional processing and production equipment, forming a mature and efficient production line, with a stable annual production capacity of 2,500 tons. Adhering to standardized and standardized industrial production management, we have successfully obtained the authoritative IATF 16949: 2016 Quality Management System Certificate for the automotive industry, which fully proves that our product quality and production management have reached international advanced industry standards.
Our core product lineup mainly includes high-quality chrome steel balls and stainless steel balls, all of which are strictly manufactured in accordance with mainstream international standards such as ISO, DIN, JIS and AISI. Our products cover precision grades from G10 to G500, with a complete size range spanning from 2.0mm to 50mm, which can meet the conventional matching needs of most industrial scenarios. In addition to standard products, we also support personalized customized services for customers. We can tailor-make non-standard size steel balls and products with special material properties according to customers’ actual application requirements. Meanwhile, we provide a variety of precision mechanical processing services, including hole drilling, CNC precision machining and other deep processing technologies, to create customized supporting products for diverse industrial needs. Our high-performance steel ball products are widely and maturely applied in numerous fields such as precision bearings, automotive core components, ball screws,
linear slide rails, industrial pumps, spray equipment, and industrial grinding media, enjoying high recognition and good reputation among customers at home and abroad.
Since its establishment more than 30 years ago, our company has always adhered to the core business principle of quality first and integrity-based operation, always putting product quality control in the primary position of enterprise development. We have built a scientific, standardized and comprehensive enterprise management system, and have established a strict whole-process inspection and quality tracking system covering raw material procurement, production and processing, finished product testing to factory delivery. Every batch of raw materials will be sampled and inspected strictly before entering the production link. All finished steel ball products will undergo full automatic screening through professional roller bar sorting equipment and photoelectric surface defect detectors to eliminate defective products 100%. The rigorous whole-process quality control mechanism effectively ensures the high precision, high stability and high durability of our products, laying a solid foundation for long-term stable cooperation with global customers.