3211 A-2Z
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
Environment & Compliance
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3211 A-2Z Bearing Product Overview & Core Advantages
The 3211 A-2Z is a double row angular contact ball bearing designed for applications requiring high rigidity and combined load capacity. This precision bearing features shielded construction for contamination protection while maintaining excellent performance in demanding environments. Its compact design enables efficient space utilization while providing superior support for both radial loads and bidirectional axial loads. Manufactured to P6 (ABEC-3) tolerance class, it ensures reliable operation in high-precision applications requiring consistent performance and dimensional stability.
3211 A-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
| 3211 | Basic bearing designation indicating bearing dimensions: 55mm bore, 100mm OD, 33.3mm width | Standardized sizing for easy integration and replacement |
| A | Contact angle optimized for combined loading | Enhanced axial load capacity and rigidity |
| 2Z | Double-sided steel shields | Effective contamination protection, extended service life |
3211 A-2Z Bearing Structural Features & Performance Benefits
High Rigidity Design: The double row construction provides superior stiffness and stability, making it ideal for applications requiring precise shaft positioning and minimal deflection under load.
Combined Load Capacity: Engineered to handle combined loads simultaneously, with a radial dynamic load rating of 13,725 lbf and radial static load rating of 11,700 lbf. The optimized contact angle ensures efficient distribution of both radial and bidirectional axial forces.
High-Speed Performance: With a limiting speed of 6,300 rpm and stainless steel cage construction, this bearing maintains stable operation at elevated rotational speeds while minimizing friction and heat generation.
Maintenance-Free Operation: The 2Z shielded design combined with factory-applied lubrication provides long-term protection against contamination and ensures consistent performance throughout the bearing's service life.
Premium Material Selection: Constructed from chrome steel rings and balls with stainless steel cage, offering excellent durability, corrosion resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
3211 A-2Z Bearing Typical Application Areas
The 3211 A-2Z double row angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: Providing high rigidity and precision in milling, grinding, and turning applications
- Industrial Gearboxes: Supporting combined loads in power transmission systems
- Pumps and Compressors: Handling axial and radial forces in rotating equipment
- Material Handling Equipment: Ensuring reliable performance in conveyor systems and positioning mechanisms
- Precision Instruments: Maintaining accuracy in measurement and testing equipment
- Electric Motors: Supporting rotor assemblies in high-performance motor applications
