R155zz
R Series Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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R155zz Bearing Product Overview & Core Advantages
The R155zz is a precision single row deep groove ball bearing designed for high-performance applications requiring compact dimensions and reliable operation. This inch-series bearing features shielded construction providing effective contamination protection while maintaining high-speed capability up to 53,000 rpm. Engineered with chrome steel components and stainless steel cage, it delivers excellent durability and consistent performance across a wide temperature range from -86 to 230 °F. The bearing's optimized internal geometry ensures smooth operation and extended service life in demanding radial load applications.
Model Code Detailed Breakdown
| Code Segment | Technical Meaning |
| R | Inch series bearing designation |
| 155 | Bore size code (0.15625") |
| zz | Double shielded construction on both sides |
R155zz Bearing Structural Features & Performance Benefits
Optimized Internal Geometry: The bearing features 10 precision balls with 0.03941" diameter arranged in a deep groove raceway, providing excellent radial load capacity (69 lbf dynamic, 27 lbf static) and smooth rotational characteristics.
Enhanced Contamination Protection: Double stainless steel shields (zz) effectively retain lubrication and exclude contaminants, making the bearing suitable for applications where frequent relubrication is impractical.
High-Speed Performance: The combination of stainless steel cage, precision ABEC1 tolerance class, and optimized internal clearance (MC3: 0.00008" to 0.0005") enables reliable operation at limiting speeds up to 53,000 rpm.
Material Excellence: Chrome steel rings and balls combined with 300 series stainless steel shields provide excellent corrosion resistance and mechanical strength, ensuring long-term reliability in various operating environments.
R155zz Bearing Typical Application Areas
- Small precision motors and miniature drive systems
- Medical devices and laboratory equipment requiring compact bearings
- Office automation equipment including printers, scanners, and copiers
- Instrumentation and measurement devices where precision and reliability are critical
- Robotics and automation components requiring small footprint bearings
- Consumer electronics with high-speed rotating mechanisms
