3307 ATN9
Double Row Angular Contact Ball Bearings
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3307 ATN9 Bearing Product Overview & Core Advantages
The 3307 ATN9 is a double row angular contact ball bearing designed for high precision applications requiring superior rigidity and load capacity. This metric bearing features an open design with a nylon cage and is pre-lubricated for immediate operation. Its double row construction enables it to support combined loads (significant radial and bidirectional axial loads) simultaneously, making it an ideal, compact solution for machinery demanding high reliability and performance in a constrained space.
3307 ATN9 Bearing Model Code Explained, Specifications & Naming Convention
- 3307: Basic designation indicating a Double Row Angular Contact Ball Bearing with a 35 mm bore, 80 mm outside diameter, and 34.9 mm width.
- A: Signifies a 30° contact angle, optimized for carrying higher axial loads.
- TN9: Denotes the cage material and type. T indicates a glass fiber reinforced Nylon 66 cage, and N9 specifies a specific cage design and snap ring arrangement, contributing to low friction and suitability for high-speed operation.
3307 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 handling heavy combined loads and moment loads. The specified 30° contact angle further enhances its axial load carrying capability.
High-Speed Performance: The lightweight Nylon TN9 cage reduces centrifugal forces, minimizes friction, and allows for a high limiting speed of 8,500 rpm. The pre-lubrication ensures smooth operation from startup.
Precision & Reliability: Manufactured to P6 (ABEC-3) tolerance class, this bearing ensures running accuracy and consistent performance. The open seal type allows for custom re-lubrication schemes to extend service life in demanding conditions.
3307 ATN9 Bearing Typical Application Areas
The 3307 ATN9 is engineered for high-performance applications across various industries, including:
- Machine Tool Spindles
- Gearboxes and Transmissions
- Industrial Pumps and Compressors
- Precision Agricultural Machinery
- Material Handling Equipment
