6309-ZNR
6300 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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6309-ZNR Bearing Product Overview & Core Advantages
The 6309-ZNR is a single row deep groove ball bearing engineered for high performance in demanding industrial applications. This shielded bearing is distinguished by its integrated snap ring on the outer ring, which provides secure axial location within a housing, simplifying assembly and enhancing operational reliability. Manufactured from high-grade chrome steel with a stainless steel cage, it offers excellent durability and corrosion resistance. Pre-lubricated with grease, it is capable of handling significant radial loads and is suitable for a wide operating temperature range from -30°C to 120°C, making it a robust and versatile solution for various machinery.
6309-ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Significance & Advantage |
|---|---|---|
| 6309 | Standard bearing designation indicating a metric single row deep groove ball bearing with a 45 mm bore, 100 mm OD, and 25 mm width. | Defines the core bearing dimensions and basic type. |
| Z | Denotes a shielded bearing on one side. | Protects against contamination from one side while allowing for high-speed operation. |
| NR | Indicates the outer ring has a snap ring groove and a fitted snap ring. | Eliminates the need for a bearing housing shoulder or complex lock nuts, providing a simple and secure axial locating feature and reducing assembly time and cost. |
6309-ZNR Bearing Structural Features & Performance Benefits
Deep Groove Raceway & High Load Capacity: The optimized raceway geometry enables the 6309-ZNR to handle high radial dynamic load ratings (12,432 lbf) and radial static load ratings (7,081 lbf), making it suitable for applications with significant radial forces.
Integrated Snap Ring for Secure Location: The outer ring is machined with a groove and comes with a pre-fitted snap ring. This design provides positive axial location, preventing creep under load and ensuring stable performance in housings without shoulder abutments.
Shielded Design & Pre-Lubrication: The Z-shield effectively retains the factory-applied grease and protects the internal components from large particulate contaminants. This contributes to a long service life and reduced maintenance requirements in many environments.
Precision Construction & Material Quality: Built to P0 tolerance class with a standard (CN) radial internal clearance, it ensures consistent and reliable operation. The use of chrome steel for rings and balls, combined with a durable stainless steel cage, provides high strength and resistance to wear.
6309-ZNR Bearing Typical Application Areas
The 6309-ZNR is ideally suited for a wide range of industrial machinery where secure axial location and reliable performance are critical. Key application areas include:
- Electric Motors and Generators
- Gearboxes and Power Transmission Systems
- Industrial Pumps and Compressors
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
