6221
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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6221 Bearing Product Overview & Core Advantages
The 6221 single row deep groove ball bearing is a fundamental precision bearing component designed for robust performance in a wide array of industrial applications. Engineered to primarily accommodate radial loads, its design ensures reliable operation and long service life. Manufactured to ABEC-1 tolerance class with a standard CN radial internal clearance, this bearing offers an excellent balance of precision, durability, and cost-effectiveness. Its open design allows for versatile lubrication options to suit specific operational needs, making it a versatile and highly reliable choice for engineers seeking a standard metric solution.
6221 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 62 | Series designation for medium-duty, deep groove ball bearings. |
| 21 | Bore diameter code, indicating a 105 mm bore size. |
| (No Suffix) | Indicates an open (unsealed) bearing, requiring external lubrication. |
6221 Bearing Structural Features & Performance Benefits
- Robust Load Capacity: The single row deep groove raceway geometry is optimized to efficiently handle significant radial loads, with a static load rating of 23,605 lbf, ensuring stability and longevity under demanding conditions.
- Precision Engineering: Conforming to ABEC-1 precision standards, this bearing provides consistent running accuracy and low vibration, which is critical for smooth operation in general machinery.
- High-Speed Capability: The standard CN radial internal clearance and the use of a durable stainless steel cage contribute to stable performance at its limiting speed of 3,500 rpm.
- Material Durability: Constructed from chrome steel for both rings and balls, the bearing offers high hardness and resistance to wear. The stainless steel cage provides excellent corrosion resistance and strength.
- Versatile Lubrication: The open seal type allows for the application of a wide range of lubricants, enabling customization for specific speed, temperature, and environmental conditions.
6221 Bearing Typical Application Areas
- Electric Motors and Generators
- Industrial Gearboxes and Transmissions
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- General Industrial Machinery requiring reliable radial support
