3309 A
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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3309 A Bearing Product Overview & Core Advantages
The 3309 A is a metric double row angular contact ball bearing designed for applications requiring high precision and robust performance. This bearing excels at simultaneously handling combined radial and axial loads from both directions, making it an ideal solution for complex loading scenarios. Manufactured with a P6 (ABEC-3) tolerance class, it ensures exceptional running accuracy and dimensional stability. Its open design, pre-lubricated for immediate use, offers versatility across a wide operating temperature range from -30°C to 110°C, providing reliable performance in demanding industrial environments.
3309 A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| A | Designates a specific contact angle of 30°, optimized for handling significant axial loads. |
| (No Seal Suffix) | Indicates an open bearing design, allowing for customized lubrication regimes and high-speed capability. |
3309 A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling the bearing to support substantial combined loads (Radial Dynamic: 16,875 lbf, Static: 11,925 lbf). The optimized contact angle ensures efficient force distribution.
- Precision & Speed: Built to P6 tolerance class with a stainless steel cage, this bearing maintains precise operation and stability at high rotational speeds, with a limiting speed of 6,700 rpm.
- Durability & Reliability: Components made from chrome steel offer excellent wear resistance and fatigue life. The bearing is pre-lubricated for immediate operation and long-term reliability.
- Compact Design: With a bore diameter of 45 mm and an outside diameter of 100 mm, it provides a high load capacity within a compact envelope, saving space in machine designs.
3309 A Bearing Typical Application Areas
This double row angular contact ball bearing is engineered for high-performance applications, including:
- Machine Tool Spindles
- Gearboxes and Transmissions
- Industrial Pumps and Compressors
- Precision Agricultural Machinery
- Material Handling Equipment
