6311-2RSNR/C3
6300 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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6311-2RSNR/C3 Bearing Product Overview & Core Advantages
The 6311-2RSNR/C3 is a single row deep groove ball bearing engineered for high reliability in demanding industrial applications. Its core advantages stem from its sealed design and increased radial internal clearance (C3), making it exceptionally suitable for applications with thermal expansion or where interference fits are used. This bearing is designed to primarily accommodate high radial loads while also handling moderate axial loads, offering a robust and maintenance-friendly solution.
6311-2RSNR/C3 Bearing Model Code Explained, Specifications & Naming Convention
- 6311: Basic model number denoting a medium-duty, single row deep groove ball bearing with a 55mm bore.
- -2RS: Designates that the bearing is fitted with contact seals on both sides. The "RS" suffix typically indicates Nitrile Rubber (NBR) seals, providing effective protection against contaminants and retaining lubricant.
- NR: Signifies that the outer ring features a snap ring groove. This allows for simplified axial location within a housing, reducing the need for complex housing shoulders and locknuts.
- /C3: Indicates that the bearing has a greater radial internal clearance than the standard CN group. This C3 clearance is essential for applications where thermal expansion of the shaft and housing differ significantly or where heavy interference fits are employed.
6311-2RSNR/C3 Bearing Structural Features & Performance Benefits
Robust Sealing for Harsh Environments: The dual-contact seals (2RS) provide superior defense against dust, moisture, and other particulate contaminants. This sealing integrity ensures a long service life and reliable operation in dirty or wet conditions, making it a low-maintenance bearing.
Simplified Assembly with Snap Ring: The integrated snap ring groove (NR) on the outer ring facilitates easier and more cost-effective installation and axial positioning. This feature enhances design flexibility and reduces overall assembly time and complexity.
Optimized for Thermal and Fit Conditions: The C3 radial internal clearance is a critical feature that prevents bearing preload and potential seizure in applications subject to high operational temperatures or heavy press fits. This ensures consistent performance and prevents premature failure.
High Load Capacity and Precision: Manufactured to ABEC 1 | ISO P0 tolerance class, this bearing offers reliable performance for general industrial use. With a high dynamic load rating of 16,096 lbf, it is built to withstand significant radial forces over an extended operational life.
6311-2RSNR/C3 Bearing Typical Application Areas
The 6311-2RSNR/C3 is ideally suited for a wide range of industrial machinery where reliability and environmental protection are paramount. Common applications include:
- Electric Motors and Generators
- Industrial Gearboxes and Transmissions
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- Pumps and Fans
