3309 ATN9
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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3309 ATN9 Bearing Product Overview & Core Advantages
The 3309 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. Its compact design and high rigidity make it ideal for demanding applications where space constraints and operational stability are critical. Manufactured with tight P6 (ABEC-3) tolerances and featuring a nylon cage optimized for high-speed operation, it delivers consistent performance in a wide temperature range from -30°C to 110°C.
3309 ATN9 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 3309 | Standard bearing series designation indicating bearing dimensions: 45mm bore, 100mm OD, 39.7mm width |
| A | Angular contact design with 30° contact angle |
| TN9 | Nylon cage, glass fiber reinforced, suitable for high-speed operation |
3309 ATN9 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides superior high rigidity support, enabling the bearing to handle significant combined loads including radial loads up to 16,875 lbf and bidirectional axial loads simultaneously.
High-Speed Performance: The TN9 nylon cage reduces rotational mass and friction, contributing to the bearing's excellent high-speed capabilities with a limiting speed of 6,700 rpm. The optimized internal geometry further enhances operational stability at elevated speeds.
Precision Engineering: Manufactured to P6 (ABEC-3) tolerance class with precise bore and outside diameter tolerances, this bearing ensures minimal runout and vibration for precision applications.
Material Excellence: Constructed from chrome steel rings and balls, the bearing offers excellent wear resistance and durability, while the nylon cage provides smooth operation and corrosion resistance.
3309 ATN9 Bearing Typical Application Areas
The 3309 ATN9 double row angular contact ball bearing is widely used in:
- Machine tool spindles and precision machining centers
- High-speed industrial pumps and compressors
- Precision gearboxes and transmission systems
- Medical equipment and laboratory instruments
- Robotics and automation systems requiring high positional accuracy
- Material handling equipment and conveyor systems
