308NR/C3
300 Series Snap Ring Bearings
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Part No.
Part No.
308NR/C3
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.64 kg
Tolerance class
ABEC 1 | ISO P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.015mm to 0
Width
23 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
10274 lbf
Radial static load rating
8093 lbf
Limiting speed
8.5 X 1000 rpm
Lubrication
None
Radial internal clearance
C3
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 11.19
/ each
In Stock
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308NR/C3 Bearing Product Overview & Core Advantages
The 308NR/C3 is a single row deep groove ball bearing engineered for demanding industrial applications requiring reliable radial load capacity and precise operation. This metric bearing features a snap ring groove on its outer ring, providing secure axial location within a housing without requiring complex machining. Manufactured to ABEC 1 | ISO P0 tolerance standards, it delivers consistent performance and is characterized by its open design and C3 radial internal clearance, making it suitable for applications with thermal expansion or where higher operational temperatures are expected.
308NR/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 308 | Standard bore diameter (40 mm) & series | Defines the core bearing dimensions. |
| NR | Snap Ring Groove on outer ring | Enables simplified axial location and secure housing fit. |
| C3 | Greater than normal radial internal clearance | Accommodates thermal expansion, ideal for high-temperature or high-speed applications. |
308NR/C3 Bearing Structural Features & Performance Benefits
- Robust Construction & High Load Capacity: Built entirely from chrome steel (rings, balls, and cage), this bearing offers excellent durability. With a dynamic load rating of 10,274 lbf and a static load rating of 8,093 lbf, it is designed to handle significant radial loads in demanding environments.
- Snap Ring Locating Feature: The integrated snap ring groove provides a cost-effective and space-saving solution for axial positioning, enhancing assembly simplicity and bearing rigidity in the housing.
- Optimized Internal Clearance: The C3 clearance is a critical feature that prevents pre-loading and binding in applications subject to shaft or housing thermal expansion, contributing to stable operation and extended service life.
- High-Speed Capability: With a limiting speed of 8,500 rpm, this open bearing is suitable for a wide range of high-velocity applications when paired with an appropriate lubrication system.
308NR/C3 Bearing Typical Application Areas
This versatile bearing is ideally suited for:
- Electric Motors and Gearboxes
- Industrial Pumps and Fans
- Agricultural and Construction Machinery
- Material Handling Conveyor Systems
- General Industrial Machinery requiring reliable radial support with secure axial location.
