FR3
FR Series Flanged Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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FR3 Bearing Product Overview & Core Advantages
The FR3 series inch-sized ball bearing represents a precision-engineered single row radial ball bearing designed for reliable performance in demanding applications. This open-type bearing features a standard inner ring construction and is manufactured to ABEC1 precision class, ensuring consistent operation and dimensional accuracy. Its compact design, with a bore diameter of 0.1875" and a width of just 0.156", makes it an ideal solution for space-constrained assemblies requiring robust radial load capacity.
FR3 Bearing Model Code Explained, Specifications & Naming Convention
| Feature | Designation | Technical Significance |
|---|---|---|
| Seal Type | Open | No integral seals, allowing for custom lubrication schemes and minimal friction for high-speed operation. |
| Cage Material | Stainless Steel | Provides excellent corrosion resistance and durability, contributing to stable performance and long service life. |
| Internal Clearance | MC3 | Defines a specific radial internal clearance range (0.00008" to 0.0005") optimized for general operating conditions. |
FR3 Bearing Structural Features & Performance Benefits
High-Grade Material Construction: Manufactured from chrome steel for both rings and balls, this bearing delivers high hardness, wear resistance, and a long operational lifespan under substantial dynamic load ratings of 249 lbf.
Optimized Rolling Element Design: The configuration of seven precision balls with a diameter of 0.0937" ensures smooth rotation and efficient load distribution, minimizing vibration and noise.
Precision & Speed Capability: Built to ABEC1 tolerance class with a stainless steel cage, this bearing supports a limiting speed of 43,000 rpm, making it suitable for high-velocity applications.
Wide Operating Temperature Range: With a functional temperature range from -86 to 230 °F, this bearing is versatile for use in various environmental conditions.
FR3 Bearing Typical Application Areas
- Small Electric Motors & Spindles
- Precision Instruments & Medical Devices
- Office Automation Equipment (e.g., printers, scanners)
- Textile Machinery
- Robotics & Automation Components
