Characterized by an exceptionally compact cross-section, this series is classified as a "lightweight, ultra-thin" category, designed to meet the exacting demands of modern high-tech products for attributes that are "lighter, thinner, and more precise." Even within extremely confined installation spaces, the series leverages its sophisticated structural design to deliver stable and efficient rotational support.
Bearing Features
In terms of manufacturing, this series adheres to precision standards measured in microns. Despite its diminutive physical profile, it makes no compromises regarding rotational accuracy, dynamic balance, or low-noise performance. By incorporating specialized lubricants and precision sealing mechanisms, these bearings achieve long-lasting lubrication while simultaneously offering superior dust resistance—attributes that further enhance their adaptability within precision-critical environments.
This product series represents an ideal choice for cutting-edge applications such as smart wearable devices, precision sensors, micro-robots, and model aircraft. In smart devices, their ultra-light weight contributes to reduced overall power consumption and enhanced response speeds; in precision sensors, their exceptionally high rotational accuracy ensures the fidelity of signal acquisition.
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 | 691 | - | 1 | 4 | 5 | 1.6 | 0.5 | - | - | 0.1 | 0.137 | 0.039 | 13.2 | 14.8 |
| F | 692 | ZZ | 2 | 6 | 7.5 | 2.3 | 0.6 | 3 | 0.8 | 0.15 | 0.333 | 0.098 | 8.3 | 9.3 |
| F | 693 | ZZ | 3 | 8 | 9.5 | 3 | 0.7 | 4 | 0.9 | 0.15 | 0.559 | 0.176 | 6 | 6.7 |
| F | 694 | ZZ | 4 | 11 | 12.5 | 4 | 1 | 4 | 1 | 0.15 | 0.96 | 0.353 | 4.4 | 4.9 |
| F | 695 | ZZ | 5 | 13 | 15 | 4 | 1 | 4 | 1 | 0.2 | 1.08 | 0.431 | 3.7 | 4.1 |
| F | 696 | ZZ | 6 | 15 | 17 | 5 | 1.2 | 5 | 1.2 | 0.2 | 1.34 | 0.519 | 3.1 | 3.5 |
| F | 697 | ZZ | 7 | 17 | 19 | 5 | 1.2 | 5 | 1.2 | 0.3 | 1.61 | 0.715 | 2.8 | 3.1 |
| F | 698 | ZZ | 8 | 19 | 22 | 6 | 1.5 | 6 | 1.5 | 0.3 | 2.23 | 0.921 | 2.4 | 2.7 |
| F | 699 | ZZ | 9 | 20 | 23 | 6 | 1.5 | 6 | 1.5 | 0.3 | 2.47 | 1.08 | 2.3 | 2.6 |

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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