6303 TN9/C3
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Basic Information
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Performance
Materials
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6303 TN9/C3 Bearing Product Overview & Core Advantages
The 6303 C3 is a single row deep groove ball bearing designed for reliable performance in a wide range of industrial applications. Engineered to primarily support radial loads, this open-type bearing offers a versatile and cost-effective solution. Its key advantages include a robust construction using chrome steel for both rings and balls, ensuring durability and consistent operation. The bearing features a standard C3 radial internal clearance, making it particularly suitable for applications with thermal expansion or where interference fits are used. With an ABEC 1 (ISO P0) tolerance class, it provides dependable precision for general machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 63 | Series designation, indicating a medium width and medium duty deep groove ball bearing. |
| 03 | Bore diameter code. For metric bearings, this corresponds to a 17 mm bore (03 * 5 = 15 mm, plus a series-specific constant). |
| C3 | Specifies a greater radial internal clearance than the standard CN group. This is critical for applications prone to thermal expansion or requiring tight fits. |
6303 TN9/C3 Bearing Structural Features & Performance Benefits
- Deep Groove Raceway & High-Quality Steel: The optimized raceway geometry and use of chrome steel for rings and balls provide excellent radial load capacity and long service life.
- Nylon Cage (Polyamide): The lightweight cage material offers superior guidance, low friction, and is ideal for high-speed operation. It also contributes to quieter running and is resistant to many chemicals.
- C3 Radial Clearance: The greater internal clearance prevents pre-loading and potential seizure in applications with elevated operating temperatures or where shaft and housing fits result in a reduction of the original clearance.
- Open Design & Versatility: As an open bearing, it allows for the use of various lubrication systems, providing flexibility for different operational environments. The absence of seals minimizes torque and allows for higher limiting speeds.
6303 TN9/C3 Bearing Typical Application Areas
The 6303 C3 bearing is a fundamental component found in numerous sectors due to its robust and versatile design. Common applications include:
- Electric Motors and Small Gearboxes
- Industrial Fans and Blowers
- Material Handling Equipment (e.g., conveyor rollers)
- Agricultural Machinery
- General Industrial Machinery requiring reliable radial support
