1309 EKTN9/C3
1300 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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1309 EKTN9/C3 Bearing Product Overview & Core Advantages
The 1309 EKTN9/C3 is a double row angular contact ball bearing designed for demanding industrial applications. This precision bearing features a tapered bore (1:12) and is pre-lubricated for immediate use. Its double row construction enables it to accommodate significant combined loads—both radial and axial forces—while maintaining high operational stability. With its optimized internal geometry and C3 radial internal clearance, it is engineered for applications requiring high rigidity and reliable performance under varying thermal conditions.
1309 EKTN9/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
| 1309 | Basic designation indicating bearing dimensions: 45mm bore, 100mm OD, 25mm width |
| EK | Conical bore (taper 1:12) for precise mounting on tapered shafts |
| TN9 | Nylon cage, injection molded, suitable for high-speed operation |
| C3 | Radial internal clearance greater than normal, suitable for applications with thermal expansion |
1309 EKTN9/C3 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row ball complement and optimized raceway geometry provide exceptional stiffness, enabling the bearing to handle substantial combined loads without compromising performance.
Precision Tapered Bore: The EK designation indicates a conical bore (1:12 taper), allowing for precise axial positioning and secure mounting on tapered shafts, ensuring optimal load distribution.
High-Speed Capability: The TN9 nylon cage offers excellent strength-to-weight ratio and low friction, contributing to the bearing's limiting speed of 8,500 rpm and smooth operation at high velocities.
Optimized Internal Clearance: The C3 radial clearance is specifically designed for applications where thermal expansion is a factor, preventing preload and ensuring consistent performance across the operating temperature range (-30° to 110°C).
Pre-Lubricated & Ready-to-Use: Factory-applied lubrication ensures immediate operation and reduces initial maintenance requirements.
1309 EKTN9/C3 Bearing Typical Application Areas
This bearing is ideally suited for applications requiring high precision and reliability:
- Industrial Gearboxes and power transmission systems
- Electric Motors and generators
- Material Handling Equipment including conveyor systems
- Agricultural Machinery and implements
- Pump Systems requiring precise shaft positioning
- Machinery with tapered shaft mounting requirements
