3311 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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3311 DMA Bearing Product Overview & Core Advantages
The 3311 double row angular contact ball bearing is engineered for applications requiring high rigidity and precision performance under combined loads. Featuring a metric design with open construction, this bearing excels in handling simultaneous radial and bidirectional axial forces. Manufactured to P6 (ABEC-3) tolerance class, it delivers exceptional dimensional accuracy and rotational stability, making it ideal for high-reliability industrial applications where precision and durability are critical.
3311 DMA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 3311 | Basic bearing designation indicating double row angular contact ball bearing with 55mm bore diameter |
| Open Construction | No seals or shields, optimized for high-speed applications with external lubrication |
| P6 Tolerance | Precision grade equivalent to ABEC-3, ensuring tight dimensional control |
| Lubricated | Factory pre-lubricated for immediate operation and optimal performance |
3311 DMA Bearing Structural Features & Performance Benefits
Double Row Design: The two-row ball arrangement provides enhanced rigidity and load capacity, making it suitable for applications with significant moment loads and demanding operating conditions.
Superior Load Handling: With a dynamic load rating of 24,975 lbf and static load rating of 22,500 lbf, this bearing effectively manages combined radial and axial loads in both directions, ensuring reliable performance under complex loading scenarios.
High-Speed Capability: The brass cage construction and optimized internal geometry enable stable operation at limiting speeds up to 5,000 rpm, making it suitable for demanding rotational applications.
Precision Engineering: Manufactured from chrome steel for both rings and balls, with tight dimensional tolerances (bore: -0.012mm to 0, OD: -0.013mm to 0) ensuring consistent performance and long service life in precision applications.
3311 DMA Bearing Typical Application Areas
- Machine Tool Spindles - High precision and rigidity requirements
- Industrial Gearboxes - Combined load handling capability
- Pump and Compressor Systems - High-speed operation with axial and radial loads
- Material Handling Equipment - Robust performance in demanding environments
- Precision Industrial Machinery - Applications requiring P6 tolerance class accuracy
