308NRJ
300 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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308NRJ Bearing Product Overview & Core Advantages
The 308NRJ is a single row deep groove ball bearing designed for reliable performance in demanding applications. This metric bearing excels in handling primarily radial loads and offers high operational stability. A key structural feature is the snap ring groove on its outer ring, which simplifies axial positioning and housing design, contributing to a more compact and cost-effective assembly. Manufactured to ABEC 1 | ISO P0 tolerance standards, it provides consistent precision and is an excellent choice for general industrial machinery requiring robust and dependable operation.
308NRJ Bearing Model Code Explained, Specifications & Naming Convention
- 308: Standard designation indicating a medium series bearing with a 40 mm bore diameter.
- NR: Denotes the outer ring has a snap ring groove. This feature allows for secure axial location within a housing without the need for complex shoulder machining or additional components.
- J: Signifies that the bearing's snap ring is supplied fitted to the groove, ensuring immediate readiness for installation.
Key Omissions: The absence of suffix codes for seals or shields indicates this is an open bearing, suitable for environments where external sealing is handled separately or where re-lubrication is planned.
308NRJ Bearing Structural Features & Performance Benefits
Simplified Assembly & Axial Location: The integrated snap ring (fitted) is the defining feature. It enables positive axial location, preventing creep under load and simplifying housing design, which reduces both manufacturing costs and assembly time.
Robust Load Capacity: Constructed from hardened chrome steel for both rings and balls, this bearing offers a high dynamic load rating of 10,274 lbf and a static load rating of 8,093 lbf, ensuring long service life under significant radial loads.
Standard Precision & Clearance: Built to ABEC 1 (ISO P0) tolerance with a standard CN radial internal clearance, it delivers reliable, smooth running performance for a wide range of industrial applications without the need for ultra-high precision.
High-Speed Capability: With a limiting speed of 8,500 rpm, it is well-suited for applications requiring moderate to high rotational velocities.
308NRJ Bearing Typical Application Areas
The 308NRJ is ideally suited for applications where ease of assembly and secure axial positioning are critical. Common uses include:
- Electric Motors and Gearboxes
- Industrial Pumps and Compressors
- Material Handling Conveyors
- Agricultural Machinery
- General Machinery with Housed Bearing Assemblies
