3209 ATN9
Double Row Angular Contact Ball Bearings
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3209 ATN9 Bearing Product Overview & Core Advantages
The 3209 ATN9 is a double row angular contact ball bearing engineered for applications demanding high rigidity and precision. This metric bearing is designed to accommodate combined loads—simultaneously handling significant radial loads and bidirectional axial loads. Its double row construction provides a compact and robust solution, making it ideal for high-reliability machinery. Manufactured to a P6 (ABEC-3) tolerance class, it ensures exceptional running accuracy, while its optimized internal geometry and nylon cage contribute to superior high-speed performance.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 3209 | Basic Bearing Designation | Indicates a double row angular contact ball bearing with a 45 mm bore, 85 mm OD, and 30.2 mm width. |
| A | Contact Angle | Specifies a standard 30-degree contact angle, optimized for carrying substantial axial loads. |
| TN9 | Cage Type & Design | Denotes a glass fiber reinforced nylon cage (Polyamide 66). This lightweight cage is essential for high-speed operation, reducing friction and centrifugal forces. |
3209 ATN9 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides a significantly stiffer support structure compared to single row bearings, effectively resisting operational deflections. This design enables the bearing to support a radial dynamic load rating of 11,700 lbf and a radial static load rating of 9,338 lbf, making it highly capable of withstanding demanding combined loads.
Optimized High-Speed Performance: The TN9 nylon cage is a key contributor to the bearing's limiting speed of 7,500 rpm. Its low mass minimizes inertial forces, while its inherent lubricity reduces friction between the cage and rolling elements. The bearing is supplied pre-lubricated for immediate operation within its specified temperature range.
Precision Engineering: Manufactured from chrome steel for both rings and balls, the bearing offers high durability and wear resistance. Adherence to the P6 tolerance class ensures precise internal clearances and dimensional stability, which is critical for applications requiring minimal runout and vibration.
3209 ATN9 Bearing Typical Application Areas
The 3209 ATN9 is ideally suited for a wide range of industrial applications where precision, speed, and rigidity are paramount. Key sectors include:
- Machine Tool Spindles: Provides the necessary rigidity and speed for high-precision milling, grinding, and turning centers.
- Industrial Pumps & Compressors: Handles the combined radial and axial loads present in pump and compressor shafts.
- Precision Gearboxes: Used in high-speed transmission systems requiring accurate shaft positioning.
- Material Handling Equipment: Suitable for the spindles of conveyor systems and other automated machinery.
