6308/HC5C3
6000 Series HC5/HC5C3 Hybrid Ceramic Bearings
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Main Dimensions
Performance
Materials
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6308/HC5C3 Bearing Product Overview & Core Advantages
The 6308/HC5C3 is a single row deep groove ball bearing engineered for exceptional performance in demanding applications. Its metric dimensions (40mm bore, 90mm OD, 23mm width) provide a compact and versatile solution. A key differentiator is the use of Silicon Nitride (Si3N4) ceramic balls, which significantly reduces friction and weight compared to all-steel designs. This bearing is characterized by its high-speed capability (up to 7,500 rpm), extended temperature range (-30°C to 120°C), and ability to handle substantial radial loads. The C3 radial internal clearance makes it particularly suitable for applications with thermal expansion or where interference fits are used.
6308/HC5C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 6308 | Standard deep groove ball bearing series with 40mm bore, 90mm OD. | Interchangeable dimensions for easy replacement. |
| HC5 | Hybrid Ceramic design with 5 Silicon Nitride (Si3N4) balls. | Reduced friction, lower operating temperature, and higher speed potential. |
| C3 | Radial internal clearance greater than Normal (CN) group. | Accommodates shaft expansion and interference fits, preventing premature failure. |
6308/HC5C3 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of a chrome steel ring and Silicon Nitride balls offers superior performance. Ceramic balls are electrically insulating, harder, and lighter than steel, leading to reduced wear, higher stiffness, and the ability to run with less lubrication.
- High-Speed Performance: The low density and smooth surface of the ceramic balls, combined with the robust chrome steel cage, enable the bearing to achieve a high limiting speed of 7,500 rpm.
- Robust Load Capacity: With a dynamic load rating of 915 lbf and a static load rating of 5395 lbf, this bearing is designed to handle significant radial loads reliably.
- Precision & Stability: Manufactured to ABEC 1 / ISO P0 tolerance class, it ensures consistent running accuracy. The open seal type allows for easy custom re-lubrication schemes tailored to specific operational needs.
6308/HC5C3 Bearing Typical Application Areas
- Electric Motors & Spindles: Especially in high-frequency motors and CNC spindles where electrical insulation and speed are critical.
- Precision Machinery: Used in machine tools, printing machinery, and other equipment demanding high running accuracy.
- Pumps & Compressors: Suitable for applications where operational temperatures may vary, benefiting from the C3 clearance.
- Agricultural and Automotive Applications: For auxiliary systems requiring a robust and reliable ball bearing solution.
