FR4zz
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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FR4zz Bearing Product Overview & Core Advantages
The FR4zz is a single row deep groove ball bearing designed for high-performance industrial applications requiring reliable radial load capacity and consistent operation. This precision bearing features inch dimensions with a 0.25" bore and shielded construction for contaminant protection. Engineered with chrome steel rings and balls combined with a stainless steel cage, it delivers excellent durability and limiting speeds up to 38,000 rpm. The ABEC1 tolerance class ensures reliable performance in various mechanical systems while maintaining compact dimensions of 0.625" OD and 0.196" width.
Model Code Detailed Explanation
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| FR4 | Basic bearing designation with specific inch dimensions | Standardized sizing for compatibility |
| zz | Double shielded construction on both sides | Enhanced contaminant exclusion and bearing protection |
FR4zz Bearing Structural Features & Performance Benefits
Deep Groove Geometry: The optimized raceway design enables efficient radial load distribution and accommodates moderate axial loads in both directions, making it versatile for various mounting configurations.
Shielded Protection System: Dual 300 series stainless steel shields provide effective contaminant exclusion while maintaining high-speed capability, significantly extending service life in demanding environments.
Precision Components: Manufactured with chrome steel rings and balls combined with a stainless steel cage, this construction ensures consistent performance and resistance to wear under the specified radial dynamic load rating of 283 lbf.
Optimized Internal Clearance: The MC3 radial internal clearance (0.00008" to 0.0005") provides optimal operational precision while accommodating thermal expansion during high-speed operation up to 38,000 rpm.
FR4zz Bearing Typical Application Areas
- Small Electric Motors: Ideal for fractional horsepower motors requiring reliable high-speed operation and compact bearing dimensions
- Precision Instruments: Suitable for laboratory equipment, measuring devices, and optical instruments demanding ABEC1 precision
- Office Automation Equipment: Perfect for printers, scanners, and copiers where consistent performance and contamination resistance are critical
- Medical Devices: Appropriate for small medical instruments requiring reliable operation within the specified temperature range (-86 to 230 °F)
- Robotics and Automation: Used in small robotic joints and positioning systems where compact bearing size and reliable performance are essential
