1203 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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1203 ETN9/C3 Bearing Product Overview & Core Advantages
The 1203 ETN9/C3 is a metric double row angular contact ball bearing engineered for applications requiring high radial load capacity and operational stability. Featuring an open design with C3 radial internal clearance and ETN9 polymer cage, this bearing delivers reliable performance in demanding environments. Its compact dimensions (17mm bore × 40mm OD × 12mm width) make it ideal for space-constrained applications while maintaining high rigidity and precise rotational characteristics.
Model Code Detailed Breakdown
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 1203 | Standard metric series, 17mm bore diameter | Industry-standard sizing for easy replacement |
| ETN9 | Glass fiber reinforced nylon cage, optimized for high speeds | Enhanced high-speed performance and reduced friction |
| C3 | Greater than normal radial internal clearance | Accommodates thermal expansion in high-temperature applications |
1203 ETN9/C3 Bearing Structural Features & Performance Benefits
Double Row Design: The dual ball complement arrangement provides enhanced radial load capacity and superior rigidity compared to single row bearings, making it suitable for applications with significant radial forces.
Optimized Cage Technology: The ETN9 polymer cage ensures excellent high-speed capability (up to 24,000 rpm) while reducing weight and improving lubrication distribution. This contributes to smoother operation and extended service life.
Precision Engineering: Manufactured from chrome steel for both rings and balls, the bearing delivers consistent performance with tight dimensional tolerances (bore: -0.008mm to 0, OD: -0.011mm to 0) for precise fitment and reliable operation.
Thermal Management: The C3 clearance provides adequate internal space to accommodate thermal expansion during operation, preventing premature failure in applications with temperature variations.
1203 ETN9/C3 Bearing Typical Application Areas
- Electric Motors: Main and auxiliary motor bearings requiring high-speed operation and radial load capacity
- Industrial Gearboxes: Power transmission systems where compact bearing dimensions and high rigidity are essential
- Material Handling Equipment: Conveyor systems, pulley assemblies, and transfer mechanisms
- Agricultural Machinery: Implement drives and power take-off units operating under demanding conditions
- Small Industrial Pumps: Centrifugal and rotary pumps requiring reliable bearing performance
