6312-2ZNR
6300 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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6312-2ZNR Bearing Product Overview & Core Advantages
The 6312-2ZNR is a single row deep groove ball bearing designed for exceptional performance in demanding applications. This metric bearing is characterized by its shielded construction on both sides (2Z) and a unique snap ring groove on its outer ring (NR), enabling simplified axial location within a housing. Its primary advantages include robust radial load capacity, reliable operation with pre-applied grease lubrication, and extended service life due to its integrated shields that protect against contamination. The combination of high-grade chrome steel components and a stainless steel cage ensures durability and consistent performance across a wide temperature range.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 6312 | Basic Bearing Series & Size | Denotes a standard single row deep groove ball bearing with a 60mm bore, 130mm OD, and 31mm width. |
| 2Z | Double Shields (Non-Removable) | Provides effective protection against the ingress of solid contaminants, enhancing bearing reliability in dirty environments. |
| NR | Snap Ring Groove on Outer Ring | Allows for secure and simplified axial location of the bearing within a housing using a snap ring, reducing design complexity and assembly time. |
6312-2ZNR Bearing Structural Features & Performance Benefits
Optimized for Radial Loads: The single row deep groove raceway geometry is engineered to carry significant radial dynamic (19,154 lbf) and static loads (11,690 lbf), making it a versatile choice for various machinery.
Enhanced Contamination Resistance: The non-contact steel shields (2Z) on both sides effectively retain the factory-applied grease and protect the internal components from dust and debris, contributing to a low-maintenance design.
Simplified Housing Design: The integrated snap ring groove (NR) on the outer ring eliminates the need for complex housing shoulders or end caps. This feature provides a cost-effective and space-saving solution for axial location.
Robust Material Construction: Manufactured from chrome steel rings and balls with a stainless steel cage, this bearing offers high strength, wear resistance, and reliable operation within a temperature range of -30°C to 120°C.
Standard Precision & Clearance: Built to P0 (Normal) tolerance class with a CN (Normal) radial internal clearance, ensuring consistent performance and interchangeability for a wide range of industrial applications.
6312-2ZNR Bearing Typical Application Areas
The 6312-2ZNR is ideally suited for applications requiring reliable radial load support with simplified mounting and contamination protection. Key industries and equipment include:
- Electric Motors and Generators
- Gearboxes and Power Transmission Systems
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- Industrial Fans and Blowers
- Pumps and Compressors (for supporting shafts)
