China precision ball bearings manufacturers and custom stainless steel bearing suppliers

, Ningbo Aosen Bearing Co., Ltd. is a professional bearing export company, leveraging its independently established manufacturing facility—Ningbo Weijun Bearing Co., Ltd., founded in 2016. With nearly a decade of experience in deep groove ball bearing production, the company boasts stable and reliable manufacturing capabilities. The Weijun factory covers an area of over 8,000 square meters and is equipped with advanced manufacturing and testing equipment, enabling large-scale production, stringent quality control, and flexible OEM customization. Its products comply with international standards and are suitable for applications requiring high corrosion resistance, reliability, and service life. Aosen integrates the manufacturing strengths of Weijun with its expertise in foreign trade, providing one-stop foreign trade solutions for global mid-to-high-end markets.

Our Advantages

Customization

We offer end-to-end, one-stop customization services for non-standard bearings. Supported by our own manufacturing facility, we maintain full control from raw material sourcing to final delivery. Bearings can be developed based on customer drawings or samples, with structural and dimensional adjustments such as extended inner rings, grooved outer rings, and special tolerance requirements to suit specific operating conditions.
Quality

A comprehensive, process-wide quality control system is in place to ensure precision and consistency. Using specialized inspection and measurement equipment, we closely monitor critical parameters including inner and outer diameters, as well as roundness. All bearings undergo standardized factory inspections—covering flatness and visual quality—before shipment, effectively preventing defects and ensuring reliable performance.
Multiformity

We have established a dual-layer product portfolio combining proprietary core models with extended model options, serving bearing applications across multiple industries. Our own factory supplies 40 proven mainstream models with stable availability, while partnerships with five qualified manufacturers expand the range to over 230 models, covering non-standard customization, special materials, and high-precision bearings.
Capacity

Our factory focuses on large-scale production of deep groove ball bearings, with an annual output of 13–15 million sets, ensuring secure and on-time delivery for high-volume orders.
Cost

Direct supply from our own factory reduces intermediate costs while maintaining consistent quality and competitive pricing. By collaborating with five specialized partner factories, we broaden product coverage and improve overall efficiency, enabling flexible procurement solutions with strong cost advantages.