6308 TN9/C4
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Part No.
Part No.
6308 TN9/C4
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
620 g
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
-0.120mm to 0
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
915 lbf
Radial static load rating
5395 lbf
Limiting speed
7.5 X 1000 rpm
Lubrication
None
Radial internal clearance
C4
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Nylon
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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6308 TN9/C4 Bearing Product Overview & Core Advantages
The 6308 C4 is a single row deep groove ball bearing designed for robust performance in general industrial applications. Engineered with open construction and manufactured to ABEC 1 | ISO P0 tolerance class, it delivers reliable operation and consistent quality. A key feature is its increased radial internal clearance (C4), making it particularly suitable for applications with thermal expansion or where interference fits are used, ensuring optimal performance under varying operational conditions.
Model Code Breakdown
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| 6308 | Basic Bearing Number | Denotes a medium duty series deep groove ball bearing with a 40mm bore, 90mm OD, and 23mm width. |
| C4 | Radial Internal Clearance | Specifies a greater than normal radial internal clearance group. This is critical for applications involving shaft or housing thermal expansion, heavy interference fits, or where lower operating temperatures are expected. |
6308 TN9/C4 Bearing Structural Features & Performance Benefits
- Optimized Load Capacity: The single row deep groove raceway design enables the bearing to accommodate significant radial loads and moderate axial loads in both directions, providing versatile load-handling capability.
- High-Speed Capability: The lightweight, durable nylon cage ensures smooth operation and guides the balls effectively, contributing to the bearing's high limiting speed of 7,500 rpm.
- Robust Construction: Manufactured from high-carbon chrome steel for both rings and balls, the bearing offers excellent hardness, wear resistance, and a long operational lifespan.
- Application Flexibility: The open design and C4 clearance allow for adaptability in challenging environments, accommodating thermal gradients and fit conditions that would compromise standard clearance bearings.
6308 TN9/C4 Bearing Typical Application Areas
This bearing is widely used in various industrial sectors due to its balanced performance and reliability.
- Electric Motors and Generators
- Industrial Gearboxes and Transmissions
- Material Handling Equipment (Conveyors, Pulleys)
- Agricultural Machinery
- General Industrial Machinery requiring bearings with increased internal clearance
