311SG
200, 300 & 6400 Series Industrial Single Row Deep Groove Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
Environment & Compliance
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311SG Bearing Product Overview & Core Advantages
The 311SG metric ball bearing is a high-performance single row deep groove ball bearing designed for robust radial load applications. Engineered with Chrome Steel rings, balls, and cage, it offers excellent durability and reliable operation. Its open design allows for versatile lubrication options, while the ABEC 1 (ISO P0) tolerance class ensures consistent performance for general industrial use. This bearing is characterized by its high radial dynamic load rating of 17,805 lbf and a limiting speed of 6,300 rpm, making it a dependable component in demanding environments.
311SG Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| 311 | Basic Bearing Number | Defines the standard metric dimensions: 55mm bore, 120mm OD, 29mm width. |
| SG | Suffix | Indicates a bearing manufactured from Chrome Steel for all core components (rings, balls, cage), providing high strength and wear resistance. |
Key Tolerances & Fits: The bore and outside diameter feature a tight tolerance of -0.015mm to 0, facilitating precise shaft and housing fits for stable operation.
311SG Bearing Structural Features & Performance Benefits
- All-Chrome Steel Construction: The use of Chrome Steel for the inner ring, outer ring, balls, and cage ensures uniform thermal expansion, high hardness, and excellent resistance to fatigue, contributing to a long bearing service life.
- Optimized Radial Load Capacity: The single row deep groove geometry is specifically engineered to handle high radial loads efficiently, with a substantial dynamic load rating of 17,805 lbf.
- High-Speed Capability: The robust Chrome Steel cage and precision grinding enable a limiting speed of 6,300 rpm, suitable for a wide range of industrial applications.
- Standard Radial Internal Clearance (CN): Provides a versatile fit for most operating conditions, accommodating thermal expansion and ensuring smooth rotation.
- Open Seal Type: Allows for custom lubrication regimens, making it adaptable to specific environmental and operational requirements.
311SG Bearing Typical Application Areas
The 311SG bearing is ideally suited for a variety of industrial machinery and equipment where reliable radial load support is paramount. Common applications include:
- Electric Motors and Generators
- Gearboxes and Power Transmission Systems
- Industrial Pumps and Fans
- Material Handling Conveyors
- Agricultural Machinery
