The 67 series consists of ultra-thin-walled bearings manufactured from SUS316, a material offering superior performance. SUS316 contains 2–3% molybdenum (Mo), providing exceptional resistance to pitting corrosion—particularly in environments such as seawater (containing chloride ions) or chemical vapors. These thin-walled flanged bearings are frequently used in the precision rotating shafts of marine exploration instruments.
Bearing Features
The series is highly space-efficient; the flanged design addresses the challenge of securing bearings within thin-walled housings, as the flange mounts directly against the housing to enable the assembly of extremely compact mechanical structures. SUS316 offers better bio-inertness than SUS304; consequently, the 6700–6706 series is commonly used in centrifuges and biochemical analyzers—specifically in components handling corrosive liquids—to ensure that no metal ions leach out and interfere with experiments.
Technical Specifications
| Bearing Reference | Boundary Diameters | Basic Dynamic | Basic Static | Limiting Speeds | |||||||||
| Flange | Open | Shield | seal | d(mm) | D(mm) | Df(mm) | B/B1(mm) | Bf(mm) | rsmin(mm) | Cr(kN) | Cor(kN) | Grease | Oil |
| F | SF6700 | ZZ | 2RS | 10 | 15 | 16.5 | 3/4 | 0.8 | 0.15 | 0.853 | 0.431 | 2.6 | 3 |
| F | SF6701 | ZZ | 2RS | 12 | 18 | 19.5 | 4 | 0.8 | 0.2 | 0.921 | 0.529 | 2.2 | 2.5 |
| F | SF6702 | ZZ | 2RS | 15 | 21 | 22.5 | 4 | 0.8 | 0.2 | 0.941 | 0.578 | 1.8 | 2.1 |
| F | SF6703 | ZZ | 2RS | 17 | 23 | 24.5 | 4 | 0.8 | 0.2 | 1 | 0.657 | 1.7 | 1.9 |
| F | SF6704 | ZZ | 2RS | 20 | 27 | 28.5 | 4 | 0.8 | 0.2 | 1.04 | 0.725 | 1.4 | 1.6 |
| F | SF6705 | - | 2RS | 25 | 32 | 34 | 4 | 1 | 0.2 | 1.09 | 0.843 | 1.2 | 1.3 |
| F | SF6706 | - | 2RS | 30 | 37 | 39 | 4 | 1 | 0.2 | 1.15 | 0.951 | 1 | 1.1 |

Jiangsu Yinghong Transmission Technology Co., Ltd. (YHU) was established in 2024 through the joint investment of Dongguan Yinghong, Linqing Boshuo, and Yancheng Jiwei. As a group-based enterprise specializing in the research, development, manufacturing, and service of transmission products, we leverage extensive industry experience and strong technical expertise to provide reliable, energy-efficient transmission solutions for customers worldwide.
The company covers more than 70 mu of land and operates nearly 10,000 square meters of manufacturing facilities. As a professional manufacturer of precision special bearings in China, we have introduced advanced Japanese precision manufacturing technology and equipped our facility with automated production lines and high-precision testing equipment. A comprehensive quality management system ensures consistent product quality and reliable performance.
As a National High-Tech Enterprise, Yinghong holds multiple invention and utility model patents and has obtained internationally recognized certifications including IATF 16949, RoHS, CE, and SGS. These certifications enable us to meet diverse customer requirements and provide effective solutions for demanding applications and complex technical challenges.
We specialize in the production of high-precision deep groove ball bearings and custom non-standard bearings under our registered trademark, “YHU”. Our main products include bearing steel bearings, stainless steel bearings, ceramic bearings, and plastic bearings.
YHU bearings are designed to deliver low noise, low vibration, low friction, high precision, great sealing performance, and high-speed operation. They also offer self-lubrication, corrosion resistance, rust resistance, acid and alkali resistance, chemical resistance, electrical insulation, non-magnetic properties, high-temperature resistance, low-temperature adaptability, and long service life, making them suitable for demanding operating environments.
Our bearings and bearing assemblies are widely used in electric motors, power tools, pneumatic tools, robotics, drones, household appliances, precision instruments, semiconductor equipment, medical devices, marine equipment, aerospace applications, financial equipment, textile machinery, fishing equipment, and a wide range of specialized industrial equipment.
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