Jiangsu Yinghong Transmission Technology Co., Ltd.
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R156/R166/R3/R3A Series Deep Groove Ball Bearings

This series comprises precision miniature deep-groove ball bearings designed to meet Imperial standards. A defining characteristic of the series is its standardized inner diameter of 4.762 mm (0.1875 inches), offering a diverse range of radial space solutions for precision machinery. As critical transmission components manufactured from high-purity bearing steel, these bearings are produced using processing techniques that prioritize exceptional dimensional consistency and rotational precision, thereby ensuring mechanical stability under high-speed operating conditions.

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Bearing Features

In terms of technical performance, the series encompasses a wide spectrum of specifications, ranging from lightweight, thin-section models to reinforced variants. For instance, the R156 model prioritizes space optimization, featuring an outer diameter of just 7.938 mm and a limiting speed of up to 58,000 rpm under oil lubrication. Conversely, the R3 and R3A models feature enhanced load-bearing capabilities, boasting a basic dynamic load rating (Cr) of up to 1.3 kN, enabling them to withstand greater radial loads.
Regarding applications, this series is widely utilized in precision medical devices (such as dental instruments), high-end office automation equipment, and high-performance aerospace modeling. Their low-friction and low-noise operating characteristics serve to enhance both the user experience and the service life of the final products. Through a combination of precision internal design and specialized lubrication greases, these bearings achieve smooth rotational performance while maintaining excellent fatigue resistance, even within complex operating environments.

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 R156 ZZ 0.1875 4.762 0.3125 7.938 0.359 9.119 0.1094 2.778 0.023 0.584 0.125 3.175 0.036 0.914 0.0039 0.1 0.363 0.147 5.2 5.8
F R166 ZZ 0.1875 4.762 0.375 9.525 0.422 10.719 0.125 3.175 0.023 0.584 0.125 3.175 0.031 0.787 0.0039 0.1 0.706 0.274 4.6 5.2
- R3 ZZ 0.1875 4.762 0.5 12.7 - - 0.1562 3.969 - - 0.196 4.978 - - 0.0118 0.3 1.3 0.49 3.8 4.2
- R3A ZZ 0.1875 4.762 0.625 15.875 - - 0.196 4.978 - - 0.196 4.978 - - 0.0118 0.3 1.48 0.617 3.2 3.6

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Jiangsu Yinghong Transmission Technology Co., Ltd.

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 China R156/R166/R3/R3A Series Deep Groove Ball Bearings Suppliers and Custom R156/R166/R3/R3A Series Deep Groove Ball Bearings Factory, 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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