3309 DMA
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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3309 DMA Bearing Product Overview & Core Advantages
The 3309 DMA is a double row angular contact ball bearing designed for applications requiring exceptional precision and reliability. Engineered with a P6 (ABEC-3) tolerance class, it delivers high running accuracy and dimensional stability. Its double row design provides superior rigidity and the ability to support combined loads—significant radial and bidirectional axial loads simultaneously. The open construction, combined with a brass cage, facilitates high-speed operation, making it an ideal precision bearing for demanding industrial environments.
3309 DMA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| D | Double Row Construction |
| M | Brass Cage |
| A | 30° Contact Angle (Optimized for axial load capacity) |
3309 DMA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row ball bearing configuration provides a robust and rigid structure, enabling it to handle substantial combined loads with high stability.
- High-Speed Performance: The machined brass cage (M) ensures excellent guidance and low friction, contributing to a high limiting speed of 6,300 rpm.
- Precision Engineering: Manufactured to P6 tolerance class, this bearing guarantees precise running accuracy and minimal vibration, which is critical for high-performance machinery.
- Optimized Internal Geometry: The 30° contact angle (A suffix) is specifically designed to support high axial loads from both directions, enhancing its versatility in complex load scenarios.
3309 DMA Bearing Typical Application Areas
The 3309 DMA double row angular contact ball bearing is ideally suited for high-precision and high-rigidity applications, including:
- Machine Tool Spindles
- Precision Gearboxes
- Industrial Pumps and Compressors
- Material Handling Equipment
