3211 A
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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3211 A Bearing Product Overview & Core Advantages
The 3211 A is a precision double row angular contact ball bearing designed for applications requiring high rigidity and exceptional running accuracy. Engineered to accommodate combined loads (simultaneous radial and bidirectional axial loads), this bearing features a compact design that saves space while delivering reliable performance in demanding conditions. Manufactured to P6 (ABEC-3) tolerance class, it ensures smooth operation and is pre-lubricated for immediate use, making it ideal for high-precision machinery where reliability is critical.
3211 A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| 3211 | Basic bearing designation indicating metric dimensions (55mm bore, 100mm OD) |
| A | 30° contact angle design optimized for higher axial load capacity |
3211 A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling the bearing to handle significant combined loads while maintaining precision alignment. With a radial dynamic load rating of 13,725 lbf and static load rating of 11,700 lbf, it offers robust performance in demanding applications.
Precision Engineering: Manufactured to P6 tolerance class with chrome steel rings and balls, the bearing ensures minimal runout and consistent performance. The stainless steel cage provides excellent durability and corrosion resistance, contributing to extended service life.
Optimized Performance: The 30° contact angle and optimized internal geometry allow for efficient operation at limiting speeds up to 6,300 rpm. The pre-lubrication ensures immediate operation and reliable performance across a temperature range of -30°C to 110°C.
3211 A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining applications requiring rigidity and accuracy
- Industrial Gearboxes - Power transmission systems needing reliable bearing performance
- Pumps and Compressors - Rotating equipment requiring combined load capacity
- Precision Instrumentation - Measurement and testing equipment demanding high accuracy
- Material Handling Equipment - Conveyor systems and industrial automation
