6308-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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6308-ZNR Bearing Product Overview & Core Advantages
The 6308-ZNR is a single row deep groove ball bearing designed for exceptional performance in demanding applications. Engineered to primarily handle radial loads, its key distinguishing feature is the snap ring groove and fitted snap ring on its outer ring. This design provides a cost-effective and space-saving method for axial location within a housing, simplifying assembly and enhancing operational reliability. Manufactured from high-grade chrome steel and featuring a stainless steel cage, this bearing offers robust construction, consistent operation, and a long service life, making it a superior choice for applications requiring high reliability and simplified mounting.
6308-ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Benefit |
|---|---|---|
| 6308 | Standard bearing series designation indicating a metric, single row deep groove ball bearing with a 40mm bore, 90mm OD, and 23mm width. | Defines the core bearing dimensions and type for interchangeability and selection. |
| Z | Denotes a shielded (non-contact) sealing on one side. | Protects the bearing interior from large contaminants while allowing for high-speed operation with minimal friction increase. |
| NR | Indicates a snap ring groove on the outer ring, supplied with a fitted snap ring. | Enables secure axial location in the housing without the need for complex housing shoulders, reducing design complexity and assembly time. |
6308-ZNR Bearing Structural Features & Performance Benefits
The performance of the 6308-ZNR is a direct result of its specific construction:
- Snap Ring Groove & Fitted Snap Ring: This is the defining feature. The snap ring acts as a positive axial stop, preventing bearing creep under load and ensuring precise positioning. This is crucial for maintaining alignment and reducing vibration in applications.
- Shielded Design (Z): The steel shield effectively prevents the ingress of large particulate contaminants, protecting the chrome steel balls and raceways. This contributes to a longer lifespan and consistent performance in moderately dirty environments.
- Stainless Steel Cage: The use of a stainless steel cage provides high strength and excellent corrosion resistance, ensuring guidance and separation of the balls even under demanding conditions, contributing to smooth operation and high-speed capability.
- Robust Load Capacity: With a dynamic load rating of 9509 lbf and a static load rating of 5395 lbf, this bearing is built to handle significant radial loads over its operational life.
6308-ZNR Bearing Typical Application Areas
The 6308-ZNR is ideally suited for a wide range of industrial machinery where secure axial location and reliable radial load support are paramount. Common applications include:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Pumps and Fans
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- Any application requiring a bearing with a snap ring for simplified housing design.
