Jiangsu Yinghong Transmission Technology Co., Ltd. Home / Products / Deep Groove Ball Bearings / Bearing Steel Bearings / Inch R Series / R133 Series Deep Groove Ball Bearings

R133 Series Deep Groove Ball Bearings

The R133 bearing is an ultra-miniature inch-series ball bearing developed specifically to meet the demands of ultra-high-speed operation. With an inner diameter of just 0.0938 inches (2.381 mm) and an outer diameter of 0.1875 inches (4.762 mm), it features an exceptionally compact profile. As a high-precision component crafted from bearing steel, this unit achieves remarkable rotational efficiency through rigorous control over the tolerances of its rings and steel balls; according to its technical specifications, its oil-lubricated limiting speed reaches an impressive 108,000 revolutions per minute.

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Bearing Features

Despite its diminutive size, this model strikes an excellent balance between load-bearing capacity and structural stability. Its basic dynamic load rating of 0.088 kN is sufficient to handle the lightweight transmission requirements found in precision micromotors, computer peripherals, and high-end audiovisual equipment. Thanks to its deep-groove ball bearing design, it maintains extremely low levels of vibration and noise during high-speed operation—a critical factor for enhancing the signal acquisition accuracy of precision instruments. Furthermore, the product exhibits excellent fatigue strength, maintaining dimensional stability even within environments characterized by continuous, high-frequency operation; it stands as a preferred core component for office automation systems, precision measuring tools, and electronic communication devices.

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 R133 ZZ 0.0938 2.381 0.1875 4.762 0.234 5.944 0.0625 1.588 0.018 0.457 0.0938 2.381 0.031 0.787 0.0039 0.1 0.186 0.059 9.2 10.4

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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