6221-2RS1/C3
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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6221-2RS1/C3 Bearing Product Overview & Core Advantages
The 6221-2RS1/C3 is a single row deep groove ball bearing designed for robust performance in demanding applications. This metric bearing features integral contact seals (2RS1) for effective contamination exclusion and is supplied with a C3 radial internal clearance, making it suitable for applications with elevated operating temperatures or where tight fits are used. Its construction from high-grade chrome steel ensures durability and a long service life, providing reliable radial load capacity. The combination of sealing, clearance, and material quality makes it an excellent choice for general industrial use where reliability is paramount.
6221-2RS1/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 6221 | Basic bearing designation indicating a single row deep groove ball bearing with a 105mm bore, 190mm OD, and 36mm width. |
| 2RS1 | Bearing is equipped with two NBR contact seals on both sides. These seals provide superior protection against contaminants like dust and moisture compared to non-contact shields. |
| C3 | Specifies a greater radial internal clearance than the Normal (CN) group. This is essential for applications involving thermal expansion, heavy interference fits, or where operational heat generation is expected. |
6221-2RS1/C3 Bearing Structural Features & Performance Benefits
- Sealed Design for Protection: The double-sided 2RS1 contact seals are molded from Nitrile Rubber (NBR), effectively sealing the bearing interior from solid and liquid contaminants. This design significantly extends bearing life in dirty or humid environments and is capable of operating within a temperature range of -30°C to 120°C.
- Optimized Internal Clearance: The C3 clearance is a key performance feature. It accommodates dimensional changes caused by thermal expansion from high-speed operation or heavy press fits onto shafts and into housings, preventing premature failure due to excessive preload.
- Robust Load Capacity: Manufactured from high-carbon chrome steel for both rings and balls, this bearing offers a high radial static load rating of 23,605 lbf and a radial dynamic load rating of 299 lbf, ensuring reliable performance under significant radial stresses.
- Standard Precision & Versatility: Conforming to ABEC 1 | ISO P0 tolerance class, it provides excellent performance for a wide range of general industrial applications without the cost of ultra-high precision grades.
6221-2RS1/C3 Bearing Typical Application Areas
The 6221-2RS1/C3 is ideally suited for a variety of industrial machinery and equipment, including:
- Electric Motors and Gearboxes
- Industrial Fans and Blowers
- Material Handling Conveyors
- Agricultural Machinery
- Construction Equipment
- Pumps and Compressors for general industrial use
