RW144zz
RW Series Extended Inner Ring Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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RW144zz Bearing Product Overview & Core Advantages
The RW144zz is a single row deep groove ball bearing designed for precision applications requiring reliable performance in compact spaces. Engineered with inch system measurements, this shielded bearing delivers excellent radial load capacity while maintaining tight dimensional tolerances. Its extended inner ring design facilitates easier mounting and positioning in assemblies. Manufactured from high-grade chrome steel components with a stainless steel cage, it offers durability and consistent operation across a temperature range of -86 to 230 °F. The pre-lubricated design and effective shielding make it suitable for applications demanding long service life and minimal maintenance.
RW144zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| RW | Manufacturer series designation | Specific product line identifier |
| 144 | Bore size code (0.125") | Precise dimensional specification |
| zz | Double shielded both sides | Enhanced contamination protection and extended lubrication life |
RW144zz Bearing Structural Features & Performance Benefits
Deep Groove Geometry: The optimized raceway profile enables efficient radial load distribution and accommodates moderate axial loads in both directions, making it versatile for various mounting configurations.
Shielded Protection: Dual 300 Series stainless steel shields provide effective contamination exclusion while minimizing friction torque, contributing to the bearing's 67,000 rpm limiting speed capability.
Extended Inner Ring: The extended inner ring design (0.1406" width) offers improved mounting stability and facilitates easier installation and alignment in precision assemblies.
Precision Construction: Manufactured to ABEC1 tolerance class with controlled radial internal clearance (MC3: 0.00008" to 0.0005"), ensuring consistent performance and smooth operation.
Optimized Component Design: Seven precision chrome steel balls (0.0394" diameter) combined with a stainless steel cage provide balanced load distribution and reliable operation under the 54 lbf dynamic load rating.
RW144zz Bearing Typical Application Areas
- Small precision motors and miniature DC motors
- Medical devices and dental handpieces requiring compact bearing dimensions
- Office automation equipment including printers, scanners, and copiers
- Instrumentation and measurement devices demanding high precision
- Robotic joints and small automation components
- Consumer electronics where space constraints and reliability are critical
- Optical positioning systems requiring smooth, precise rotation
