3311 A-2Z
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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3311 A-2Z Bearing Product Overview & Core Advantages
The 3311 A-2Z is a double row angular contact ball bearing engineered for applications requiring robust support for combined loads. Its design efficiently accommodates both radial loads and bidirectional axial loads simultaneously, making it an ideal solution for compact arrangements where high rigidity and operational reliability are paramount. Manufactured to P6 (ABEC-3) tolerance class, this precision bearing ensures consistent performance and is pre-lubricated for immediate use, contributing to its status as a high-value component for demanding industrial machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 3311 | Standard bearing series designation, indicating the basic dimensions: 55mm bore, 120mm outside diameter. |
| A | Contact angle of 30 degrees, optimized for carrying significant axial loads. |
| 2Z | Bearing is fitted with shields on both sides. This provides effective protection against contamination from solid particles while allowing for high-speed operation. |
3311 A-2Z Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides a significantly wider supporting surface than single row bearings, resulting in exceptional rigidity and the ability to handle substantial combined (radial and axial) loads from both directions.
Optimized for Performance: The stainless steel cage ensures stability and reduced friction at high rotational speeds, contributing to the bearing's reliable limiting speed of 5,300 rpm. The standard chrome steel construction for rings and balls provides excellent durability and fatigue resistance.
Low-Maintenance Operation: The inclusion of 2Z shields on both sides effectively retains the factory-applied lubricant and excludes contaminants, promoting a long service life with minimal maintenance requirements.
3311 A-2Z Bearing Typical Application Areas
The 3311 A-2Z is ideally suited for a wide range of industrial applications where precision and reliability under combined loads are critical. Key sectors include:
- Industrial Gearboxes and power transmission systems
- Pumps and Compressors
- Medium-duty Machine Tool Spindles
- Material handling equipment and conveyor systems
