309-2ZNR
300 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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309-2ZNR Bearing Product Overview & Core Advantages
The 309-2ZNR is a single row deep groove ball bearing engineered for robust radial load capacity and reliable operation in demanding applications. Its key distinguishing feature is the integral snap ring on the outer ring, which facilitates simplified axial positioning and secure housing fixation, eliminating the need for complex housing shoulders. Combined with shielded construction on both sides, this bearing offers effective contaminant protection and retained lubrication, making it an ideal, space-saving solution for applications requiring high reliability and simplified assembly.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 309 | Basic bearing series, defining the standard boundary dimensions (Bore: 45 mm, OD: 100 mm, Width: 25 mm). |
| 2Z | Bearing is shielded on both sides. The non-contact steel shields protect against contaminant ingress while retaining lubricant, contributing to maintenance-free operation. |
| N | Signifies a snap ring groove machined on the outer ring. |
| R | Indicates that the bearing is supplied with a snap ring fitted in the groove, ready for installation. |
309-2ZNR Bearing Structural Features & Performance Benefits
- Snap Ring Design for Axial Location: The outer ring is equipped with a snap ring and groove. This feature provides a positive axial locating function, allowing for a simplified and compact housing design without the need for complex shoulders or end caps, reducing both assembly time and overall system cost.
- Effective Sealing with Shields (2Z): The non-contact steel shields on both sides offer excellent protection against dust and other contaminants while effectively retaining the pre-applied grease lubrication. This design is optimal for applications where re-lubrication is difficult or undesirable, ensuring long service life and reduced maintenance.
- Robust Load Capacity: Manufactured from chrome steel for both rings and balls, the bearing delivers a high dynamic load rating of 12,364 lbf and a static load rating of 9,892 lbf, ensuring durability under significant radial loads.
- Stainless Steel Cage: The stainless steel cage provides high strength and corrosion resistance, contributing to stable operation and a high limiting speed of 6,000 rpm.
309-2ZNR Bearing Typical Application Areas
The 309-2ZNR is ideally suited for applications requiring secure axial positioning and reliable performance in contaminated environments. Common uses include:
- Electric Motors and Gearboxes
- Agricultural Machinery
- Material Handling Equipment (e.g., conveyor pulleys)
- Automotive Components (e.g., alternators, idler pulleys)
- Industrial Fans and Blowers
