1211 EKTN9/C3
1200 Series Self Aligning Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
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1211 EKTN9/C3 Bearing Product Overview & Core Advantages
The 1211 EKTN9/C3 is a metric double row angular contact ball bearing engineered for high-performance applications requiring superior rigidity and precise operation. Its double-row ball design with a 1:12 tapered bore enables it to accommodate combined radial and axial loads simultaneously. This bearing is pre-lubricated and features a C3 radial internal clearance, making it an excellent choice for applications with thermal expansion considerations. Constructed from chrome steel and equipped with a nylon cage, it delivers reliable performance in demanding environments.
1211 EKTN9/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1211 | Basic bearing designation indicating metric dimensions: 55mm bore, 100mm OD, 21mm width. |
| EK | Designates a tapered bore (1:12 ratio) and optimized internal design for enhanced performance. |
| TN9 | Indicates a glass fiber reinforced nylon cage, providing excellent high-speed capability and reduced friction. |
| C3 | Specifies a greater radial internal clearance than normal, suitable for applications with shaft expansion or high operating temperatures. |
1211 EKTN9/C3 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact ball bearing design provides significantly increased rigidity compared to single row bearings, enabling stable support for combined radial and axial loads.
- Optimized High-Speed Performance: The lightweight TN9 nylon cage minimizes centrifugal forces, reduces friction, and allows for a high limiting speed of 9,000 rpm, making it a true high-speed bearing.
- Tapered Bore for Secure Mounting: The 1:12 tapered bore ensures a precise and secure interference fit on adapter sleeves or tapered shafts, preventing creep under load.
- Pre-Lubricated & Ready-to-Use: Factory-applied lubrication ensures immediate operation and reduces initial maintenance requirements.
- Precision Manufacturing: Manufactured with tight dimensional tolerances on the bore diameter, outside diameter, and width for reliable integration into precision machinery.
1211 EKTN9/C3 Bearing Typical Application Areas
The 1211 EKTN9/C3 is ideally suited for a wide range of industrial machinery requiring robust performance and high reliability. Key application areas include:
- Electric Motors and Gearboxes
- Industrial Pumps and Compressors
- Material Handling Equipment
- Agricultural Machinery
- Ventilation Systems and Fans
