Jiangsu Yinghong Transmission Technology Co., Ltd. Home / Products / Flanged Bearings / Stainless Steel Flanged Bearings / SUS420 Flange Bearings / SF68 Series SUS420 Stainless Steel Flanged Bearings

SF68 Series SUS420 Stainless Steel Flanged Bearings

This series consists of ultra-thin-walled miniature flanged bearings, covering small sizes with inner diameters ranging from 1mm to 9mm. Featuring a flanged design, these bearings simplify axial positioning within the host assembly, eliminating the need for additional bearing housings. In space-constrained precision equipment, the flange sits flush against the mounting surface, effectively preventing the axial shifting often encountered with miniature bearings during high-speed operation. 

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Bearing Features

Manufactured from SUS420 high-carbon stainless steel and heat-treated to achieve a hardness exceeding HRC 50–55, the series offers exceptional wear resistance and rigidity, capable of withstanding high contact stresses. Thanks to their lightweight construction and low frictional torque, the 68 series excels in applications requiring strict control over starting torque—such as instrumentation and dental medical equipment—while supporting extremely high rotational speeds.

Technical Specifications

Bearing Reference Boundary Diameters Basic Dynamic Basic Static Limiting Speeds
Flange Open  Shield  d
mm
D
mm
Df
mm
B
mm
Bf
mm
B1
mm
Bf1
mm
rsmin
mm
Cr(kN) Cor(kN) Grease Oil
F SF681 - 1 3 3.8 1 0.3 - - 0.05 0.074 0.02 16.5 18.5
F SF682 ZZ 2 5 6.1 1.5 0.5 2.3 0.6 0.08 0.167 0.049 9.4 10.6
F SF683 ZZ 3 7 8.1 2 0.5 3 0.8 0.1 0.314 0.108 6.6 7.4
F SF684 ZZ 4 9 10.3 2.5 0.6 4 1 0.1 0.637 0.225 5.1 5.7
F SF685 ZZ 5 11 12.5 3 0.8 5 1 0.15 0.715 0.284 4.1 4.6
F SF686 ZZ 6 13 15 3.5 1 5 1.1 0.15 1.08 0.441 3.5 3.9
F SF687 ZZ 7 14 16 3.5 1 5 1.1 0.15 1.18 0.51 3.1 3.5
F SF688 ZZ 8 16 18 4 1 5 1.1 0.2 1.25 0.588 2.8 3.1
F SF689 ZZ 9 17 19 4 1 5 1.1 0.2 1.32 0.666 2.5 2.8

About Us

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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