3211 ATN9
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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3211 ATN9 Bearing Product Overview & Core Advantages
The 3211 ATN9 is a double row angular contact ball bearing designed for applications requiring high precision and reliability. This precision bearing excels at simultaneously handling combined radial and bidirectional axial loads, making it ideal for complex loading conditions. Its compact design provides excellent high rigidity support while maintaining superior rotational accuracy. With its optimized internal geometry and high-quality materials, this bearing delivers exceptional performance in demanding industrial environments.
3211 ATN9 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Impact |
| 3211 | Basic bearing designation indicating double row angular contact design with 55mm bore, 100mm OD | Defines core bearing dimensions and construction type |
| A | 30° contact angle | Optimized for axial load capacity while maintaining good radial performance |
| TN9 | Nylon cage, glass fiber reinforced | Enables high-speed operation with reduced friction and excellent guidance |
3211 ATN9 Bearing Structural Features & Performance Benefits
High Rigidity Design: The double row construction provides superior stiffness and stability, effectively resisting moment loads and ensuring precise shaft positioning. This makes it ideal for applications requiring minimal deflection under heavy combined loads.
Enhanced Load Capacity: With a radial dynamic load rating of 13,725 lbf and static load rating of 11,700 lbf, this bearing handles significant combination loads while maintaining performance integrity. The optimized raceway geometry ensures even stress distribution.
High-Speed Performance: The TN9 nylon cage contributes to excellent high-speed capability, allowing operation up to 6,300 rpm. The lightweight cage design reduces centrifugal forces and ensures smooth operation at elevated speeds.
Precision Engineering: Manufactured to P6 tolerance class (ABEC-3), this bearing guarantees consistent dimensional accuracy and running precision, essential for applications demanding minimal vibration and noise.
3211 ATN9 Bearing Typical Application Areas
- Machine Tool Spindles: Precision machining centers requiring high rigidity and accuracy
- Industrial Gearboxes: Power transmission systems handling combined radial and axial loads
- Pump Systems: Centrifugal pumps and compressor applications
- Material Handling Equipment: Conveyor systems and automated guided vehicles
- Electric Motors: High-performance motors requiring precise shaft support
- Precision Instrumentation: Medical equipment and measuring devices
