307-2ZNR
300 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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307-2ZNR Bearing Product Overview & Core Advantages
The 307-2ZNR is a single row deep groove ball bearing designed for exceptional reliability in industrial applications. This shielded bearing features an integral snap ring on its outer ring, enabling simplified axial positioning within housings and reducing assembly complexity. Manufactured to P0 tolerance class with standard CN radial clearance, it delivers consistent performance for handling radial loads with high efficiency. Pre-lubricated with grease, it offers immediate operation and extended service life across a wide temperature range from -30°C to 120°C.
307-2ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Advantage |
|---|---|---|
| 307 | Standard bore diameter 35mm, outside diameter 80mm, width 21mm | Standardized dimensions for easy replacement and interchangeability |
| 2Z | Non-contact steel shields on both sides | Effective contamination protection while maintaining high-speed capability |
| NR | Snap ring groove and snap ring on outer ring | Simplifies housing design and provides secure axial location |
307-2ZNR Bearing Structural Features & Performance Benefits
Optimized Load Capacity: The single row deep groove raceway geometry enables efficient handling of both radial loads and moderate axial loads in either direction, with a dynamic load rating of 7801 lbf and static load rating of 5957 lbf.
Enhanced Contamination Protection: The 2Z shielded design provides effective sealing against dust and debris while maintaining low friction, contributing to the bearing's limiting speed of 7,600 rpm.
Precision Engineering: Manufactured from chrome steel rings and balls with a stainless steel cage, the bearing ensures dimensional stability and corrosion resistance. The P0 tolerance class guarantees consistent performance in general industrial applications.
Simplified Installation: The integrated snap ring (NR designation) with an outside diameter of 86.6mm eliminates the need for additional retaining components, reducing assembly time and cost while providing reliable axial positioning.
307-2ZNR Bearing Typical Application Areas
- Electric Motors and small industrial gearboxes
- Material Handling Equipment including conveyor systems
- Agricultural Machinery components and implements
- Automotive Components such as alternators and pumps
- Industrial Fans and blower assemblies
- General Machinery requiring reliable radial load support
