Inch R Series Bearing Steel Bearings Manufacturers

Inch R Series: Precision Deep Groove Ball Bearings for Inch-Based Systems

Jiangsu Yinghong Transmission Technology Co., Ltd. (YHU) is a professional manufacturer of high-precision deep groove ball bearings, including the Inch R Series. As a Wholesale Inch R Series Bearing Steel Bearings Factory, we supply these inch-dimensioned bearings to industries ranging from electric motors and power tools to robotics and medical devices. Our Inch R Series is part of our Deep Groove Ball Bearings line, specifically under Bearing Steel Bearings.

These bearings are designed for applications that require inch-based mounting dimensions, such as legacy equipment, American-standard motors, gearboxes, and various industrial machinery. The deep groove geometry handles both radial and moderate axial loads, making them versatile for many rotating assemblies.

Product Range and Series Overview

Our Inch R Series includes the following standard series, each engineered to meet specific load, speed, and mounting requirements:

• R133 – Ultra-miniature series for compact instruments and small motors.
• R1-4, R1-5 – Small bore series for precision tools and light-duty applications.
• R144, R155, R156/R166/R3/R3A – Mid-range series for general industrial use.
• R168/R188/R4/R4A, R1810 – Larger bore series for higher load capacity.
• R6/R1038, R8 – Popular sizes for motors, pumps, and gearboxes.

All series are manufactured from high-carbon chromium bearing steel (GCr15) for excellent hardness, wear resistance, and fatigue life. We also offer stainless steel (SUS304, SUS316, SUS420, SUS440) and hybrid ceramic options for corrosive or high-temperature environments.

Application Fit and Material Considerations

The Inch R Series is 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, and fishing equipment. The choice of material depends on the operating environment:

• Bearing steel (GCr15) – Best for general-purpose applications with moderate loads and speeds.
• Stainless steel (SUS304/316) – For corrosion resistance in washdown, marine, or chemical environments.
• Stainless steel (SUS420/440) – For higher hardness and wear resistance in demanding mechanical applications.
• Ceramic (ZrO2, Si3N4) – For electrical insulation, non-magnetic properties, and high-speed operation.

Sealing options include open, metal shields (ZZ), and rubber seals (2RS). The sealing choice affects contamination protection, lubrication retention, and friction torque.

Critical Specifications and Performance

Our Inch R Series bearings are manufactured to high precision grades (ABEC-1 to ABEC-7) and are available with various internal clearances (C2, CN, C3, C4). Key performance characteristics include:

• Low noise and vibration – Operating noise as low as 20–25 dB for quiet applications.
• High speed capability – Suitable for high-speed spindles and dental handpieces.
• Low friction – Reduced energy consumption and heat generation.
• Excellent sealing – Prevents ingress of contaminants and retains lubricant.
• Long service life – Designed for extended operation under proper lubrication.

We also offer custom clearance and preload adjustments for specific application requirements.

Configuration and Customization

We understand that standard catalog items may not always fit your exact needs. Our engineering team supports OEM/ODM customization, including:

We can also design non-standard bearings based on your drawings or samples, including special dimensions, flanges, or mounting features.

Quality Assurance and Testing

Our factory operates under a comprehensive quality management system certified to IATF 16949, RoHS, CE, and SGS standards. We use automated production lines and high-precision testing equipment to verify dimensional accuracy, noise, vibration, sealing, and material properties. Each batch undergoes rigorous inspection before shipment, and we provide SGS test reports upon request.

We also conduct failure analysis and bearing life testing to support continuous improvement and ensure reliability in your specific application.

Integration, Installation, and Support

We provide technical documentation including dimensional drawings, mounting instructions, and lubrication guidelines. Our engineering team is available to assist with bearing selection, fit-up calculations, and troubleshooting. For large-volume projects, we can coordinate just-in-time delivery and provide packaging that protects bearings during transit.

We also offer training materials for installation and maintenance to help your team maximize bearing life and performance.

Information We Use to Configure Your Solution

Frequently Asked Questions

What is the difference between Inch R Series and Metric MR Series?

Inch R Series bearings use inch-based bore and outer diameters (e.g., 1/8", 3/16", 1/4"), while Metric MR Series uses millimeter dimensions. The choice depends on your existing shaft and housing design. We offer both to accommodate global standards.

Can you supply stainless steel versions of the Inch R Series?

Yes, we offer SUS304, SUS316, SUS420, and SUS440 stainless steel versions for corrosion resistance and higher hardness. These are ideal for food processing, medical, and marine applications.

What is the typical lead time for custom Inch R Series bearings?

Lead time depends on complexity and quantity. Standard sizes are often in stock, while custom designs may require 2–4 weeks for prototyping and production. We work with you to meet your project schedule.

Do you provide test reports or certifications?

Yes, we provide SGS test reports, material certificates, and dimensional inspection reports. Our quality system is certified to IATF 16949, RoHS, and CE.

Can you help with bearing selection for a new application?

Absolutely. Our engineering team can analyze your load, speed, and environmental conditions to recommend the best bearing configuration. We also offer failure analysis and design optimization services.

Related Products and Categories

Our portfolio also includes Products for applications with different operating ranges, interfaces or integration requirements.