1204 ETN9/C3
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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1204 ETN9/C3 Bearing Product Overview & Core Advantages
The 1204 ETN9/C3 is a double row angular contact ball bearing designed for applications demanding high precision and robust performance. This metric bearing features an open design and is pre-lubricated for immediate use. Its primary advantage lies in its ability to accommodate significant radial loads, making it an ideal choice for compact assemblies where space is limited but performance cannot be compromised. The combination of a nylon cage and a generous C3 radial internal clearance ensures reliable operation across a wide temperature range and under varying operational conditions.
1204 ETN9/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 1204 | Standard bearing size designation | Indicates a 20mm bore, 47mm OD, and 14mm width. |
| E | Optimized internal design | Features a larger ball complement and modified raceway geometry for increased load capacity. |
| TN9 | Nylon (Polyamide) cage, glass fiber reinforced | Contributes to lower friction, quieter operation, and is ideal for high-speed applications. |
| /C3 | Radial internal clearance greater than Normal (CN) | Provides operational stability in applications with expected thermal expansion or heavy interference fits. |
1204 ETN9/C3 Bearing Structural Features & Performance Benefits
High Load Capacity and Rigidity: The double row construction and E-type internal design significantly increase the radial dynamic load rating (2858 lbf) and static load rating (765 lbf), providing a high rigid support system that effectively resists deflection under load.
Optimized for Speed and Temperature: The lightweight TN9 nylon cage minimizes centrifugal forces, allowing for a high limiting speed of 20,000 rpm. The standard pre-lubrication and open seal type facilitate efficient heat dissipation, supporting a stable operating temperature range from -30°C to 110°C.
Precision and Compliance: Manufactured from chrome steel for both rings and balls, this bearing offers high durability and wear resistance. Its manufacturing adheres to strict dimensional tolerances, ensuring precision fit and performance. The bearing is compliant with ROHS and REACH environmental directives.
1204 ETN9/C3 Bearing Typical Application Areas
The 1204 ETN9/C3 is engineered for demanding industrial environments. Its combination of high-speed capability, robust load rating, and compact bearing dimensions makes it suitable for a wide array of applications, including:
- Electric Motors and Generators
- Industrial Gearboxes and Power Transmission Systems
- Pumps and Compressors
- Material Handling Equipment
- Agricultural Machinery
