Jiangsu Yinghong Transmission Technology Co., Ltd.
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Jiangsu Yinghong Transmission Technology Co., Ltd. Home / Products / Deep Groove Ball Bearings / Bearing Steel Bearings / Inch R Series / R144, R2-5, R2-6, R2, R2A Series Deep Groove Ball Bearings

R144, R2-5, R2-6, R2, R2A Series Deep Groove Ball Bearings

This series comprises a set of precision bearings designed around a unified standard inner diameter of 0.125 inches (3.175 mm), offering mechanical engineers highly flexible options for component selection. Ranging from the thin-walled R144—featuring an outer diameter of just 0.25 inches—to the heavy-duty R2A, with an outer diameter reaching 0.5 inches, the series covers a comprehensive spectrum of applications, from lightweight power transmission to robust structural support. Every model in the series is manufactured using high-purity bearing steel and undergoes optimized heat treatment processes, ensuring that the bearings maintain superior physical properties across a wide range of operating temperatures.

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Bearing Features

Technical specifications indicate that, depending on the specific outer diameter, the dynamic load ratings for this series range from 0.284 kN to 0.637 kN—capabilities that perfectly meet the power requirements of various home appliances, fitness equipment, and textile machinery. For instance, the R2 model—a representative of the series—boasts a high dynamic load rating of 0.637 kN and achieves a limiting speed of 58,000 RPM under oil lubrication. This design philosophy—characterized by the parallel development of multiple specifications—aims to resolve a common design challenge encountered in precision micro-machinery: situations where the shaft diameter is fixed while the load requirements vary significantly. Whether the application calls for the quiet operation demanded by home appliance motors or the exceptional wear resistance required for power tools, this product series offers an ideal specification with the precise balance of accuracy and strength to meet those specific needs.

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 R144 ZZ 0.125 3.175 0.25 6.35 0.296 7.518 0.0938 2.381 0.023 0.584 0.1094 2.778 0.031 0.787 0.0039 0.1 0.314 0.108 6.9 7.8
F R2-5 ZZ 0.125 3.175 0.3125 7.938 0.359 9.119 0.1094 2.778 0.023 0.584 0.1406 3.572 0.031 0.787 0.0039 0.1 0.559 0.176 5.9 6.7
F R2-6 ZZ 0.125 3.175 0.375 9.525 0.422 10.719 0.1094 2.778 0.023 0.584 0.1406 3.572 0.031 0.787 0.0039 0.1 0.637 0.225 5.2 5.8
F R2 ZZ 0.125 3.175 0.375 9.525 0.44 11.176 0.1562 3.969 0.03 0.762 0.1562 3.969 0.03 0.762 0.0118 0.3 0.627 0.216 5.2 5.8
- R2A ZZ 0.125 3.175 0.5 12.7 - - 0.1719 4.366 - - 0.1719 4.366 - - 0.0118 0.3 0.637 0.225 4.2 4.7

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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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