1211 ETN9/VK313
1200 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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1211 ETN9/VK313 Bearing Product Overview & Core Advantages
The 1211 ETN9/VK313 is a double row angular contact ball bearing designed for applications requiring high rigidity and the ability to support combined loads. Featuring a metric tapered bore (1:12), this precision bearing offers superior performance in demanding environments. Its double row design provides high radial and axial load capacity, making it an ideal choice for compact arrangements where space is at a premium and operational reliability is critical.
1211 ETN9/VK313 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1211 | Standard bearing series designation, indicating bearing dimensions (55mm bore, 100mm OD, 21mm width). |
| E | Optimized internal design for enhanced load capacity. |
| TN9 | Nylon (polyamide) cage, pressed window type. Contributes to lower friction, quieter operation, and suitability for high-speed applications. |
| /VK313 | Indicates the bearing is lubricated with a specific high-performance grease (VK313), suitable for the specified temperature range. |
1211 ETN9/VK313 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row ball complement and robust construction provide exceptional stiffness, enabling the bearing to effectively handle significant radial loads and axial loads in both directions simultaneously.
High-Speed Performance: The lightweight TN9 nylon cage reduces centrifugal forces and ensures stable operation at the high limiting speed of 9,000 rpm. The optimized internal geometry further supports smooth, high-velocity rotation.
Pre- Lubrication & Maintenance: The bearing is pre-lubricated with VK313 grease, offering long-term lubrication life within the operating temperature range of -30°C to 110°C, reducing maintenance needs.
Tapered Bore: The 1:12 tapered bore allows for precise axial positioning and secure mounting on adapter sleeves or tapered shafts, ensuring a tight fit and minimizing internal clearance.
1211 ETN9/VK313 Bearing Typical Application Areas
This bearing is engineered for high-performance machinery and systems, including:
- Electric Motors and Generators
- Industrial Gearboxes and Drives
- Pumps and Compressors
- Material Handling Equipment
- Agricultural Machinery
