6309-2ZTN9/C3GJN
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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6309-2ZTN9/C3GJN Bearing Product Overview & Core Advantages
The 6309-2ZTN9/C3GJN is a single row deep groove ball bearing engineered for superior performance in demanding applications. This shielded bearing is designed to primarily handle radial loads while also accommodating moderate axial loads in both directions. Its construction ensures high operational reliability and long service life. Key advantages include its high limiting speed and robust design, making it an ideal choice for applications requiring precision and durability. The bearing comes with a C3 radial internal clearance, suitable for applications with thermal expansion or where interference fits are used.
6309-2ZTN9/C3GJN Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 6309 | Basic bearing series and size designation (45mm bore, 100mm OD, 25mm width). |
| 2Z | Bearing is equipped with non-contact shields on both sides. This provides effective protection against contamination while minimizing friction and heat generation, allowing for higher speeds compared to contact seals. |
| TN9 | Indicates a glass fiber reinforced polyamide (Nylon) cage, snap-type design. This cage material is lightweight, contributes to low friction and high-speed capability, and offers excellent strength and wear resistance. |
| C3 | Specifies a greater than normal radial internal clearance. This is selected for applications where thermal expansion of the shaft or housing is expected, or where tight interference fits are used, preventing preload and potential bearing failure. |
| GJN | This suffix is not standard for a non-lubricated bearing. In this context, it may indicate a specific manufacturer's designation or a special process. As per the provided specifications, the bearing is supplied without lubrication ("None"), allowing the user to apply a grease suitable for their specific operating conditions. |
6309-2ZTN9/C3GJN Bearing Structural Features & Performance Benefits
Optimized for High-Speed Operation: The combination of the non-contact 2Z shields and the lightweight, robust TN9 nylon cage significantly reduces friction and allows the bearing to achieve a high limiting speed of 6,700 rpm. This makes it suitable for electric motors, spindles, and other high-speed machinery.
Robust Load Capacity: Manufactured from high-grade chrome steel for both rings and balls, this bearing offers a high dynamic load rating of 11,915 lbf and a static load rating of 7,194 lbf. This ensures reliable performance under significant radial loads.
Precision and Stability: Built to ABEC 1 | ISO P0 tolerance class, the bearing provides consistent running accuracy and low noise levels, which is essential for smooth operation in precision equipment.
Application Flexibility: The C3 clearance provides operational flexibility in environments with varying thermal conditions. The absence of factory lubrication ("None") gives engineers the freedom to select the optimal grease for their specific temperature, speed, and environmental requirements.
6309-2ZTN9/C3GJN Bearing Typical Application Areas
- Electric Motors and Generators: Ideal for main shaft support in industrial motors due to its high-speed capability and robust construction.
- Industrial Gearboxes and Transmissions: Provides reliable support for shafts under radial loads.
- Material Handling Equipment: Used in conveyor pulleys and rollers where contamination protection is needed.
- Agricultural Machinery: Suitable for applications in pumps and auxiliary drives.
- General Industrial Machinery: A versatile choice for pumps, fans, and blowers requiring a balance of speed, load, and protection.
