Zhejiang Yingfei Biotechnology Co., Ltd.

Zhejiang Yingfei Biotechnology Co., Ltd. has been deeply engaged in precision bearing manufacturing for over 20 years. Located in the Yangtze River Delta Industrial Corridor, leveraging the advantages of the Ningbo-Taizhou bearing cluster, the company boasts a 30,000 m² smart factory equipped with 12 fully automated production lines, including grinding and overmolding, with an annual production capacity exceeding 60 million units. Yingfei is a core supplier of cost-effective solutions for mid-to-high-end bearings.

The company specializes in four main series: deep groove ball bearings, flanged bearings, miniature bearings, and overmolded bearings. With bore diameters ranging from 3 mm to 60 mm, the company offers over 700 stock models in materials including high-carbon chromium steel, stainless steel, 420/440 steel, and engineering plastics. Our products strictly adhere to GB/T 307.1, ISO 492, and ABEC-3/5 precision standards, achieving a vibration level of ZV3 and a noise level of ≤25 dB at 3000 rpm. They operate in temperatures from -40°C to 180°C, show no rust after a 72-hour salt spray test, and have a 1200-hour life test with an intactness rate exceeding 98%.

The company has established its own physical, chemical, and metrology center, introducing Tokyo Precision roundness gauges, Mahr profilometers, and an SPC data traceability system. 36 error-proofing processes are implemented from steel incoming to finished product shipment, achieving a Cpk of ≥1.67 for critical dimensions. Targeting cost-sensitive markets such as home appliances, motorcycles, electric vehicles, motors, power tools, scooters, 3D printers, smart security, and agricultural machinery, Infinity has launched "TN" engineering plastic outer ring overmolded bearings. These bearings, molded in a single injection process, offer 30% vibration and noise reduction, while remaining 25% priced lower than all-metal bearings. With monthly sales of 800,000 units, Infinity has become the preferred choice for domestic shared scooter manufacturers. Inferi, with ISSO certification, exports its products to countries such as South Korea, Russia, Greece, and Brazil, with a 20-day shipping time commitment. Adhering to the principle of "small profits driven by volume and integrity built on integrity," the company offers MOQs as low as 100 sets, with next-day delivery in Jiangsu, Zhejiang, and Shanghai, and three-day delivery nationwide. OEM/ODM support is available, along with laser marking and neutral packaging. Over the next three years, Inferi aims to elevate the quietness and lifespan of low- and mid-range bearings to high-end standards, making Chinese precision bearings affordable and effective for small and medium-sized enterprises worldwide.