SR144zz
SR Series Stainless Steel Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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SR144zz Bearing Product Overview & Core Advantages
The SR144zz is a precision miniature ball bearing designed for demanding applications requiring high reliability and consistent performance. As a single row, shielded bearing constructed entirely from stainless steel, it offers excellent corrosion resistance. Its primary advantage lies in its ability to handle radial loads efficiently while operating at high speeds, with a limiting speed of 60,300 rpm. This makes it an ideal, compact solution for high-speed mechanisms where space is limited and performance is critical.
SR144zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| SR | Standard Bearing Series | Denotes a common series of miniature bearings. |
| 144 | Bore & Outside Diameter Code | Specifies the bearing dimensions: 0.125" bore and 0.25" outside diameter. |
| zz | Shielded on Both Sides | Indicates the bearing is fitted with non-contact shields on both sides to protect against contamination while maintaining high-speed capability. |
SR144zz Bearing Structural Features & Performance Benefits
Robust Stainless Steel Construction: All components, including rings, balls, cage, and shields, are made from 300 series stainless steel, providing superior corrosion resistance and durability in harsh environments.
High-Speed Performance: The combination of a stainless steel cage, seven precision balls, and non-contact zz shields enables the bearing to achieve a very high limiting speed, making it a true high-speed bearing.
Precision & Low Noise: Manufactured to ABEC1 tolerance class with a controlled MC3 radial internal clearance, this bearing ensures smooth, quiet, and precise rotation, minimizing vibration.
Application Flexibility: The bearing requires lubrication, allowing engineers to select a grease or oil suitable for the specific operating temperature range of -86 to 230 °F.
SR144zz Bearing Typical Application Areas
The SR144zz is engineered for compact, high-speed devices across various industries. Key applications include:
- Small Precision Motors: Ideal for spindle motors in hard disk drives, drones, and small fans.
- Medical Devices: Used in surgical handpieces, dental drills, and small pump systems where reliability and corrosion resistance are paramount.
- Office Automation Equipment: Found in high-speed scanners, printers, and copiers.
- Instrumentation and Robotics: Suitable for encoders, sensors, and small joints in robotic arms requiring precise motion control.
