1311 ETN9/C3
1300 Series Self Aligning Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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1311 ETN9/C3 Bearing Product Overview & Core Advantages
The 1311 ETN9/C3 is a double row angular contact ball bearing engineered for demanding applications requiring high load capacity and operational reliability. This metric bearing features an open design and is pre-lubricated for immediate use. Its core advantage lies in its ability to support significant radial loads, making it an ideal choice for robust machinery. The combination of a nylon cage and a generous C3 radial internal clearance ensures stable performance under varying thermal conditions and high speeds, offering a compact and highly effective solution for power transmission systems.
1311 ETN9/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1311 | Standard bearing series designation, indicating a metric double row angular contact ball bearing with a 55mm bore. |
| E | Optimized internal design for enhanced load capacity. |
| TN9 | Indicates the cage material is Nylon (Polyamide 66), contributing to lower friction, quieter operation, and suitability for high-speed applications. |
| C3 | Specifies a radial internal clearance greater than the Normal (CN) group. This is crucial for applications with expected thermal expansion, preventing preload and ensuring smooth operation. |
1311 ETN9/C3 Bearing Structural Features & Performance Benefits
- High Load Capacity & Rigidity: The double row ball construction provides superior radial load support and high rigidity, making the bearing exceptionally stable under heavy loads.
- Optimized for Speed: The lightweight TN9 nylon cage minimizes centrifugal forces, reduces friction, and allows for a high limiting speed of 7,500 rpm, which is ideal for high-speed machinery.
- Accommodates Thermal Expansion: The C3 clearance is a key feature that allows for dimensional changes due to operational heat, preventing binding and potential seizure, thereby enhancing bearing life and reliability.
- Ready-to-Install: The bearing comes pre-lubricated, simplifying installation and providing immediate protection during the initial run-in period.
- Durable Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational lifespan.
1311 ETN9/C3 Bearing Typical Application Areas
The 1311 ETN9/C3 is suited for a wide range of industrial applications where high radial load capacity and speed are paramount. Key sectors include:
- Electric Motors and Generators
- Gearboxes and Power Transmission Systems
- Industrial Fans and Blowers
- Material Handling Conveyors
- Agricultural Machinery
