308NRTN9
300 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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308NRTN9 Bearing Product Overview & Core Advantages
The 308NRTN9 is a single row deep groove ball bearing engineered for exceptional radial load capacity and reliable performance in demanding applications. This metric bearing features an open design and is manufactured to ABEC 1 | ISO P0 tolerance standards, ensuring consistent quality and interchangeability. A key structural advantage is the snap ring fitted on the outer ring, which provides secure axial location within the housing, simplifying assembly and enhancing operational stability. With a high limiting speed and robust dynamic and static load ratings, it is an ideal solution for applications requiring high reliability and long service life.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 308 | Standard Bearing Series & Size Code | Defines the core dimensions: 40mm bore, 90mm OD, 23mm width. |
| NR | Snap Ring Groove | Indicates the outer ring has a groove for a snap ring, aiding in axial location and simplifying housing design. |
| TN9 | Nylon Cage, Injection Molded | Specifies a lightweight, low-friction cage material that contributes to high-speed performance, smooth operation, and is suitable for a wide temperature range. |
308NRTN9 Bearing Structural Features & Performance Benefits
- Optimized Radial Load Capacity: The deep groove raceway and single row construction are designed to efficiently handle significant radial loads, with a high dynamic load rating of 10,274 lbf.
- High-Speed Capability: The combination of the lightweight TN9 nylon cage and precision-ground chrome steel components allows for a high limiting speed of 8,500 rpm, minimizing friction and heat generation.
- Secure Axial Location: The integrated snap ring on the outer ring prevents axial movement, ensuring stable positioning within the assembly and reducing the complexity of the housing design.
- Standardized Precision & Clearance: Manufactured to ABEC 1 (ISO P0) tolerance class with a standard CN radial internal clearance, guaranteeing consistent performance, low noise, and easy replacement.
308NRTN9 Bearing Typical Application Areas
- Electric Motors and Gearboxes
- Industrial Pumps and Fans
- Material Handling Conveyors
- Agricultural Machinery
- Automotive Components (e.g., alternators, idler pulleys)
