SR144
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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SR144 Bearing Product Overview & Core Advantages
The SR144 is a precision miniature ball bearing designed for demanding applications requiring high reliability in compact spaces. As a single row deep groove ball bearing with an open design, it excels at handling radial loads efficiently. Manufactured entirely from stainless steel, it offers excellent corrosion resistance, making it suitable for a wide operating temperature range from -86 to 230 °F. Its compact bearing dimensions (0.125" bore, 0.25" OD) and light weight make it an ideal component for miniaturized assemblies where space and weight are critical constraints.
SR144 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SR | Indicates a standard, single row deep groove ball bearing series. |
| 144 | Specifies the specific bearing size within the series, defining the bore, outside diameter, and width. |
| Open | No seals or shields, allowing for higher limiting speeds and easy re-lubrication. Requires external protection from contaminants. |
SR144 Bearing Structural Features & Performance Benefits
Optimized for High-Speed Operation: The open seal type and stainless steel cage contribute to a high limiting speed of 60,300 rpm, minimizing friction and heat generation at high rotational velocities.
Robust Load Capacity: With a radial dynamic load rating of 49 lbf and a static rating of 15 lbf, this bearing provides reliable performance under significant radial loads for its compact size.
Precision and Stability: Built to ABEC1 tolerance class with a controlled MC3 radial internal clearance (0.00008" to 0.0005"), ensuring smooth and consistent operation with minimal runout.
Corrosion-Resistant Construction: All critical components, including rings, balls, and cage, are made from stainless steel, offering long-term durability in harsh or wash-down environments.
SR144 Bearing Typical Application Areas
- Small Precision Motors: Ideal for spindle support in miniature DC motors and stepper motors.
- Medical and Dental Devices: Used in handheld surgical tools, dental handpieces, and pump drives due to its corrosion resistance and reliability.
- Office Automation Equipment: Found in scanners, printers, and small fans.
- Instrumentation and Control Systems: Suitable for encoders, sensors, and guidance systems requiring high-speed, low-noise operation.
- Radio-Controlled Models and Drones: Provides high-performance support in motor and gearbox assemblies.
