R4zz
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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R4zz Bearing Product Overview & Core Advantages
The R4zz is a single row deep groove ball bearing designed for precision applications requiring reliable radial load capacity and smooth operation. Manufactured to ABEC1 precision class standards, this inch-series bearing features 300 Series stainless steel shields for contaminant protection while maintaining low friction. Its compact design with a 0.25" bore and 0.625" outside diameter makes it ideal for space-constrained applications where consistent performance is critical.
R4zz Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| R | Rubber Seal (Note: Specification indicates shielded) | Contaminant protection |
| 4 | Bearing series designation | Size and capacity specification |
| zz | Double metal shields (both sides) | Enhanced contamination protection, extended service life |
R4zz 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.
Precision Construction: Manufactured to ABEC1 tolerance class with tight dimensional control (bore tolerance: -0.0003" to 0") ensures consistent performance in precision applications.
Shielded Protection: 300 Series stainless steel shields provide effective contaminant exclusion while maintaining low operating torque, contributing to the limiting speed of 38,000 rpm.
Optimized Internal Clearance: With MC3 radial internal clearance (0.00008" to 0.0005"), the bearing delivers stable operation across various temperature conditions and mounting fits.
R4zz Bearing Typical Application Areas
- Small precision motors and miniature DC motors
- Medical equipment and dental handpieces
- Office automation equipment including printers and scanners
- Instrumentation and measuring devices
- Robotic components and small gearboxes
- Computer peripherals and cooling fans
