1304 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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1304 ETN9/C3 Bearing Product Overview & Core Advantages
The 1304 ETN9/C3 is a double row angular contact ball bearing designed for exceptional performance in demanding applications. This precision bearing features an open design and is pre-lubricated for immediate use. Its primary advantage lies in its ability to accommodate significant combined loads—simultaneously handling substantial radial forces and moderate axial loads in both directions. The compact design, with a bearing size of 20mm bore and 52mm outside diameter, offers a high load capacity within a minimal cross-section, making it ideal for applications requiring high rigidity and reliable operation in high-speed environments.
1304 ETN9/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 1304 | Standard bearing designation (20mm bore, 52mm OD) | Defines core bearing dimensions. |
| E | Optimized internal design | Enhanced load rating and performance. |
| TN9 | Nylon (Polyamide) cage, glass fiber reinforced | Reduced friction, excellent for high-speed operation, and quiet running. |
| C3 | Greater than normal radial internal clearance | Accommodates thermal expansion in applications with high operating temperatures or heavy loads. |
1304 ETN9/C3 Bearing Structural Features & Performance Benefits
The performance of the 1304 ETN9/C3 is a direct result of its sophisticated engineering. The double row ball complement, combined with a steep contact angle, provides high rigidity and stability, effectively resisting moment loads. This construction delivers a superior radial dynamic load rating of 3218 lbf, making it robust against combined loads. The TN9 nylon cage is a key contributor to its high-speed capability, allowing for a limiting speed of 18,000 rpm by minimizing centrifugal forces and ensuring smooth operation. The C3 clearance ensures reliable performance under thermal or heavy load conditions, preventing preload and potential seizure. Manufactured from chrome steel for both rings and balls, the bearing ensures durability and a long service life.
1304 ETN9/C3 Bearing Typical Application Areas
This versatile double row angular contact ball bearing is engineered for a wide range of industrial machinery and precision equipment. Its balance of high rigidity, high-speed performance, and significant load capacity makes it an ideal choice for:
- Electric Motors and Gearboxes
- Pumps and Compressors
- Material Handling Systems
- Agricultural Machinery
- Industrial Fans and Blowers
