FR4
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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FR4 Bearing Product Overview & Core Advantages
The R2-5 is a precision-engineered single row deep groove ball bearing designed for reliable performance in compact spaces. Manufactured to ABEC1 tolerance standards, this inch-series bearing delivers consistent radial load capacity and smooth operation. Its open design allows for versatile lubrication options while maintaining excellent dimensional stability. The bearing's optimized 8-ball configuration with chrome steel components ensures durability and consistent performance across a wide temperature range from -86 to 230 °F.
Model Code Technical Breakdown
| Code Element | Technical Specification |
|---|---|
| R2-5 | Basic bearing designation indicating inch dimensions (0.25" bore × 0.625" OD) |
| Open | No seals or shields, allowing for custom lubrication solutions |
| ABEC1 | Precision tolerance class ensuring consistent dimensional accuracy |
| MC3 | Radial internal clearance group (0.00008" to 0.0005") for standard applications |
FR4 Bearing Structural Features & Performance Benefits
Deep Groove Geometry: The optimized raceway design enables efficient radial load distribution with a dynamic load rating of 283 lbf and static load rating of 112 lbf, making it suitable for various mechanical applications.
Premium Material Construction: Manufactured from chrome steel rings and stainless steel cage, the bearing provides excellent corrosion resistance and mechanical strength. The 0.0937" diameter balls ensure smooth rotation and reduced vibration.
High-Speed Capability: With a limiting speed of 38,000 rpm, the bearing maintains stable operation under demanding conditions. The MC3 clearance provides optimal internal fit for most industrial applications.
Precision Engineering: Tight dimensional tolerances (bore: -0.0003" to 0", OD: -0.0003" to 0") ensure reliable fit and performance in precision assemblies. The lightweight design (4.82g) minimizes rotational inertia.
FR4 Bearing Typical Application Areas
- Small Electric Motors: Ideal for fractional horsepower motors and miniature DC motors
- Precision Instruments: Suitable for medical devices, optical equipment, and measuring instruments
- Office Automation: Used in printers, scanners, and copier mechanisms
- Robotics & Automation: Applied in small robotic joints and precision positioning systems
- Aerospace Components: Suitable for instrumentation and control systems in aircraft
