6311NR/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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6311NR/C3 Bearing Product Overview & Core Advantages
The 6311NR/C3 is a single row deep groove ball bearing engineered for robust radial load capacity in demanding industrial applications. This metric bearing features a snap ring groove on its outer ring (NR designation), enabling secure axial positioning and simplified housing design. Manufactured to ABEC 1 | ISO P0 tolerance standards with a C3 radial internal clearance, it accommodates thermal expansion in applications with elevated operating temperatures. The open design and chrome steel construction ensure reliable performance across a wide temperature range from -30°C to 120°C.
Model Code Breakdown
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 6311 | Standard deep groove ball bearing series with 55mm bore, 120mm OD | Proven design with optimal bearing dimensions for medium-duty applications |
| NR | Snap ring groove on outer ring | Simplifies assembly and provides secure axial location without additional components |
| C3 | Greater than normal radial internal clearance | Accommodates thermal expansion in high-temperature applications |
6311NR/C3 Bearing Structural Features & Performance Benefits
Optimized Load Capacity: With a radial dynamic load rating of 16,096 lbf and static load rating of 10,116 lbf, this bearing delivers exceptional durability under substantial radial loads. The single row deep groove geometry provides optimal stress distribution across the chrome steel balls and raceways.
Precision Engineering: Manufactured to ABEC 1 | ISO P0 tolerance class with tight dimensional control (bore tolerance: -0.015mm to 0), ensuring consistent performance and interchangeability. The chrome steel cage maintains proper ball spacing for smooth operation.
Thermal Management: The C3 clearance provides additional operational space to prevent binding caused by thermal expansion, making it suitable for applications where temperatures may vary significantly.
Simplified Installation: The integrated snap ring groove eliminates the need for complex housing shoulders or separate retaining devices, reducing assembly time and cost while ensuring reliable axial positioning.
6311NR/C3 Bearing Typical Application Areas
- Electric Motors and industrial gearboxes requiring secure bearing location
- Material Handling Equipment such as conveyor systems and pulley assemblies
- Agricultural Machinery including tractor components and implement drives
- Industrial Pumps and fan assemblies operating at moderate speeds
- General Industrial Machinery where reliable radial load support is essential
