Made from SUS304 austenitic stainless steel, this material features a high chromium and nickel content. Its corrosion resistance far surpasses that of the 400 series in humid or mildly acidic/alkaline environments (such as those involving kitchen appliances or cleaning equipment). Unlike 420-grade steel, it is not prone to surface oxidation spots, ensuring ease of maintenance and cleanliness.
Bearing Features
In its annealed state, SUS304 is essentially non-magnetic. For precision laboratory instruments or electronic testing equipment sensitive to magnetic fields, the use of R1-4 flanged bearings effectively minimizes electromagnetic interference and enhances sensor reading accuracy. Its imperial design and precision flange make it highly compatible with medical devices or aviation models built to European and American standards; the flange ensures stable support when mounted on plastic housings or aluminum alloy brackets.
Technical Specifications
| Bearing Reference | Boundary Diameters | Basic Dynamic | Basic Static | Limiting Speeds | ||||||||||||||||||
| Flange | Open | Shield | d inch |
d mm |
D inch |
D mm |
Df inch |
Df mm |
B inch |
B mm |
Bf inch |
Bf mm |
B1 inch |
B1 mm |
Bf1 inch |
Bf1 mm |
rsmin inch |
rsmin mm |
Cr kN |
Cor kN |
Grease | Oil |
| F | SFR1-4 | ZZ | 0.0781 | 1.984 | 0.25 | 6.35 | 0.296 | 7.518 | 0.0938 | 2.381 | 0.023 | 0.584 | 0.1406 | 3.572 | 0.031 | 0.787 | 0.0039 | 0.1 | 0.284 | 0.098 | 7.9 | 8.9 |

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.
Angular contact ball bearings are essential for handling combined loads because their inner and outer raceways are offset along the bearing axis. This built-in contact angle creates a direct, uninter...
View MoreIn a special production environment, many stainless steel bearings are equipped with corresponding sealing devices. On the one hand, it keeps the grease (oil) inside the stainless steel bearing from b...
View MoreUnder normal circumstances, stainless steel bearings will produce a certain amount of noise during machine operation. However, if the vibration level of stainless steel bearings increases significantl...
View MoreStainless steel bearings offer numerous advantages not only due to stringent manufacturing processes and precision requirements, but also because of the superior quality of the material itself. When s...
View More