308SG
200, 300 & 6400 Series Industrial Single Row Deep Groove Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
308SG
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
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
CN
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:
$ 9.2
/ each
In Stock
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308SG Bearing Product Overview & Core Advantages
The 308SG metric ball bearing is a single row radial ball bearing engineered for high-performance applications requiring reliable operation under substantial radial loads. Manufactured to ABEC 1 | ISO P0 tolerance standards, it delivers consistent precision and durability. Its open design allows for versatile lubrication options, while the high-grade chrome steel construction ensures excellent wear resistance and a long service life, making it a robust and cost-effective solution for industrial machinery.
308SG Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 308 | Standard bearing series designation, indicating the bearing dimensions (40mm bore, 90mm OD, 23mm width). |
| SG | Signifies a bearing manufactured from Chrome Steel for both rings and balls, offering high hardness and resistance to degradation. |
308SG Bearing Structural Features & Performance Benefits
- Robust Load Capacity: The single row deep groove construction is optimized to handle high radial dynamic load ratings of 10,274 lbf and radial static load ratings of 8,093 lbf, providing reliable support in demanding conditions.
- Precision Engineering: Built to ABEC 1 (ISO P0) tolerance class with a standard CN radial internal clearance, ensuring smooth, low-vibration operation and facilitating precise shaft positioning.
- High-Speed Capability: With a limiting speed of 8,500 rpm, this bearing is suitable for a wide range of high-velocity applications. The one-piece chrome steel cage provides stability and strength at high rotational speeds.
- Material Integrity: All core components—rings, balls, and cage—are constructed from chrome steel, ensuring uniform thermal expansion, high fatigue life, and consistent performance across its operating temperature range of -30°C to 120°C.
- Flexible Lubrication: The open seal type allows for the application of specialized lubricants tailored to specific operational environments, from high temperatures to contaminated conditions.
308SG Bearing Typical Application Areas
This versatile ball bearing is ideally suited for:
- Electric Motors and Generators
- Industrial Gearboxes and Transmissions
- Material Handling Conveyors
- Agricultural Machinery
- Pumps and Fans
