6311-ZN/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-ZN/C3 Bearing Product Overview & Core Advantages
The 6311-ZN/C3 is a single row deep groove ball bearing engineered for robust performance in demanding industrial applications. This metric bearing features a shielded design and an optimized C3 radial internal clearance, making it exceptionally suitable for applications with thermal expansion or where interference fits are used. Its high radial dynamic load rating of 16,096 lbf ensures reliable operation under significant stress, while the snap ring groove on the outer ring provides secure axial location and simplifies housing design. Manufactured to ABEC 1 | ISO P0 tolerance standards, it delivers consistent precision and is an ideal choice for general machinery requiring high reliability and durability.
6311-ZN/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 6311 | Basic bearing designation indicating a single row deep groove ball bearing with a 55 mm bore, 120 mm OD, and 29 mm width. |
| Z | Denotes a shielded bearing on one side, protecting the internal components from large particulate contaminants. |
| N | Indicates a snap ring groove on the outer ring, facilitating secure axial positioning within the housing. |
| /C3 | Specifies a greater than normal radial internal clearance. This is critical for applications involving thermal expansion, heavy interference fits, or where operational temperatures fluctuate. |
6311-ZN/C3 Bearing Structural Features & Performance Benefits
Robust Construction for High Load Capacity: The single row deep groove raceway and high-quality chrome steel construction (rings, balls, and cage) provide excellent resistance to radial loads, with a dynamic rating of 16,096 lbf. This ensures long service life even under continuous heavy-duty operation.
Enhanced Contamination Protection: The non-contact shield (Z) on one side effectively prevents larger particles from entering the bearing, enhancing reliability in moderately contaminated environments without significantly increasing friction.
Simplified Assembly and Axial Location: The inclusion of a snap ring groove (N) on the outer ring allows for easy and secure axial fixation, reducing the complexity and cost of the surrounding housing structure.
Optimized for Demanding Conditions: The C3 radial clearance is a key feature that accommodates dimensional changes due to interference fits and differential thermal expansion between the shaft, bearing, and housing, preventing premature failure from excessive preload.
Wide Operating Temperature Range: With an operational temperature range from -30°C to 120°C, this bearing is suitable for a variety of industrial climates and applications.
6311-ZN/C3 Bearing Typical Application Areas
The 6311-ZN/C3 is a versatile component found in numerous industrial sectors. Its combination of high load capacity, contamination protection, and axial locating feature makes it ideal for:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- General Industrial Machinery requiring reliable, medium-duty support
