6303-Z
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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6303-Z Bearing Product Overview & Core Advantages
The 6303-Z is a single row deep groove ball bearing designed for exceptional performance in a wide range of industrial applications. Its core advantages stem from a robust metric design, featuring a shielded (Z-type) construction on one side that effectively protects against contaminant ingress while retaining lubrication. Manufactured to a P6 tolerance class, this bearing offers high precision and reliable operation, making it suitable for applications demanding high rotational accuracy. Its optimized internal geometry and high-quality materials ensure a high limiting speed and excellent capability to handle radial loads.
6303-Z Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Code | Technical Meaning |
|---|---|---|
| Basic Designation | 6303 | Indicates a standard single row deep groove ball bearing with a 17mm bore, 47mm outside diameter, and 14mm width. |
| Suffix | Z | Denotes a shielded bearing. A steel shield is fitted on one side, providing excellent protection against large particles and helping to retain grease. |
| (Implied) | P6 | The specified tolerance class, indicating higher dimensional and running accuracy than standard (P0) bearings. |
6303-Z Bearing Structural Features & Performance Benefits
- Shielded Design for Contamination Resistance: The Z-shield provides a robust physical barrier, significantly extending bearing life in environments with airborne contaminants by preventing their entry and retaining the factory-fitted grease lubrication.
- High Precision & Rigidity: Manufactured to P6 tolerance standards, this bearing ensures minimal runout and vibration, contributing to smooth and quiet operation at high speeds. The deep groove raceway and high-quality chrome steel construction provide excellent radial load capacity and rigidity.
- Optimized for High-Speed Operation: The combination of a low-friction stainless steel cage, precision-ground balls and raceways, and effective grease lubrication allows for a high limiting speed of 22,000 rpm.
- Low-Maintenance & Long Service Life: The pre-lubricated grease and shielded design create a sealed-for-life unit in many applications, reducing maintenance needs and total cost of ownership.
6303-Z Bearing Typical Application Areas
The 6303-Z is a versatile component ideal for a multitude of applications requiring high-speed and reliable radial load support, including:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Material Handling Equipment
- Agricultural Machinery
- Automotive Components (e.g., alternators, idlers)
