6311-ZNR
6300 Series Snap Ring Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
6311-ZNR Bearing Product Overview & Core Advantages
The 6311-ZNR is a single row deep groove ball bearing designed for robust performance in demanding radial load applications. A key distinguishing feature is the integral snap ring on its outer ring, which simplifies axial location within a housing, reducing assembly complexity and cost. Manufactured from high-grade chrome steel with stainless steel cages and shielded on both sides, it offers reliable operation, contamination protection, and long service life. This bearing is engineered for high radial load capacity and stable operation within a wide temperature range, making it a versatile and dependable choice for industrial machinery.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 6311 | Basic Bearing Series & Size | Indicates a metric, single row deep groove ball bearing with a 55mm bore, 120mm OD, and 29mm width. |
| -Z | Shield on One Side | The bearing is shielded on one side to retain lubricant and exclude larger contaminants. |
| -NR | Snap Ring Groove with Snap Ring | Specifies that the outer ring has a snap ring groove and is supplied with a fitted snap ring for axial location. |
6311-ZNR Bearing Structural Features & Performance Benefits
- Snap Ring for Simplified Assembly: The integrated snap ring eliminates the need for complex housing shoulders or end caps, allowing for a more compact and cost-effective housing design while providing secure axial positioning.
- High Radial Load Capacity: The deep groove raceway and robust construction enable it to support significant radial dynamic load ratings (16,658 lbf), ensuring durability under heavy loads.
- Shielded & Pre-Lubricated for Reliability: The shielded design protects the internal components from large particulate contaminants and retains the grease lubrication, supporting maintenance-free operation in many applications.
- Stainless Steel Cage for High-Speed Capability: The stainless steel cage provides strength and reduced friction, contributing to stable performance at the specified limiting speed of 8,000 rpm.
- Standard Tolerance & Clearance: Manufactured to P0 tolerance class and CN radial internal clearance, this bearing offers consistent, reliable performance for general industrial applications.
6311-ZNR Bearing Typical Application Areas
The 6311-ZNR is ideally suited for applications requiring secure axial location and high radial load handling. Common uses include:
- Electric Motors and Gearboxes
- Industrial Pumps and Fans
- Material Handling Conveyors
- Agricultural Machinery
- Automotive Components (e.g., alternators, idlers)
