3304 ATN9
Double Row Angular Contact Ball Bearings
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3304 ATN9 Bearing Product Overview & Core Advantages
The 3304 ATN9 is a metric double row angular contact ball bearing engineered for precision applications requiring high rigidity and reliable performance. This precision bearing is designed to simultaneously accommodate combined loads—significant radial loads and axial loads in both directions—thanks to its optimized contact angle and double row construction. Its compact design, featuring a 20 mm bore and 52 mm outside diameter, makes it ideal for space-constrained, high-reliability assemblies. Manufactured to P6 (ABEC-3) tolerance class and pre-lubricated for immediate use, it delivers exceptional operational accuracy and longevity.
3304 ATN9 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| A | Designates a specific contact angle (typically 30°) optimized for handling substantial axial loads. |
| TN9 | Indicates a glass fiber reinforced nylon cage. This cage design contributes to lower friction, reduced weight, and is suitable for high-speed operation. |
3304 ATN9 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling stable support under combined loads. With a dynamic load rating of 5512 lbf and static load rating of 3510 lbf, it is built for demanding applications.
- High-Speed Performance: The lightweight TN9 nylon cage minimizes centrifugal forces, allowing for a limiting speed of 13,000 rpm. The pre-lubrication ensures optimal performance at these high rotational speeds.
- Precision & Durability: Manufactured from chrome steel for both rings and balls, and held to a P6 tolerance class, this bearing guarantees precise running accuracy and extended service life.
- Ready-to-Install: The bearing is pre-lubricated, facilitating easy installation and immediate operation without the need for initial greasing.
3304 ATN9 Bearing Typical Application Areas
- Machine Tool Spindles
- Precision Gearboxes
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
- High-Speed Automation and Robotics
