307-ZNR
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-ZNR Bearing Product Overview & Core Advantages
The 307-ZNR is a single row deep groove ball bearing designed for exceptional performance in demanding industrial applications. Its core advantage lies in the combination of shielded protection and a snap ring groove on the outer ring, enabling simplified axial location within a housing. Manufactured to P0 tolerance class with CN radial clearance, this bearing offers reliable operation and high precision for handling significant radial loads. The pre-lubricated design ensures immediate operation and reduced maintenance needs.
307-ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| Z | One Shield (Non-Contact) on one side | Protects against contamination while allowing for high-speed operation. |
| NR | Snap Ring Groove on the outer ring | Facilitates easy and secure axial location, simplifying housing design and assembly. |
307-ZNR Bearing Structural Features & Performance Benefits
- Robust Construction: The single row deep groove raceway and stainless steel cage provide stable operation and effective guidance for the balls, contributing to the bearing's high radial dynamic load rating of 7801 lbf.
- Simplified Assembly & Location: The integrated snap ring groove eliminates the need for complex housing shoulders or separate retaining components, reducing assembly time and cost.
- Contamination Protection & Lubrication Retention: The shielded design effectively excludes larger contaminants and retains the factory-applied grease lubrication, supporting a long service life and a limiting speed of 9,500 rpm.
- Material Integrity: Components made from chrome steel (rings and balls) ensure high hardness and wear resistance, suitable for a wide temperature range from -30°C to 120°C.
307-ZNR Bearing Typical Application Areas
The 307-ZNR is ideally suited for applications requiring reliable radial load capacity with simplified axial positioning. Common uses include:
- Electric Motors and Gearboxes
- Agricultural and Industrial Machinery
- Material Handling Equipment (e.g., conveyor pulleys)
- Pumps and Blowers
- Automotive Components and Accessories
