309SFF
200, 300 & 6400 Series Industrial Single Row Deep Groove Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
Environment & Compliance
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309SFF Bearing Product Overview & Core Advantages
The 309SFF is a single row deep groove ball bearing designed for reliable performance in general industrial applications. Engineered with open construction and manufactured to ABEC 1 | ISO P0 tolerance standards, it offers a robust solution for handling primarily radial loads. Its chrome steel construction ensures durability and consistent operation within a wide temperature range from -30°C to 120°C. This bearing is characterized by its high limiting speed of 7,500 rpm and is compliant with RoHS and REACH directives, making it a versatile and dependable choice for various machinery.
309SFF Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 309 | Standard Bearing Size Designation | Indicates a bore diameter of 45 mm, outside diameter of 100 mm, and width of 25 mm. |
| SFF | Manufacturer-specific suffix for internal construction and performance features. | Denotes optimized internal geometry and material selection for enhanced performance and load capacity. |
| (Implied: Open) | No seals or shields. | Allows for higher speeds and facilitates custom lubrication regimes, but requires a clean operating environment. |
309SFF Bearing Structural Features & Performance Benefits
Deep Groove Raceway Design: The geometry of the inner and outer rings is optimized to support significant radial dynamic load ratings (12,364 lbf) and radial static load ratings (9,892 lbf), making it suitable for applications with substantial radial forces.
High-Grade Chrome Steel Construction: All core components—rings, balls, and cage—are manufactured from chrome steel. This material provides excellent hardness, wear resistance, and a long operational lifespan.
High-Speed Capability: The combination of the open design and a precisely engineered cage allows for a high limiting speed of 7,500 rpm, enabling use in demanding, high-rotation applications.
Standard Radial Internal Clearance (CN): This standard clearance provides a balance of fit, running accuracy, and thermal expansion management for a wide range of operating conditions.
309SFF Bearing Typical Application Areas
The 309SFF deep groove ball bearing is widely used across numerous industries due to its robust design and reliable performance. Key application areas include:
- Electric Motors and Generators
- Industrial Gearboxes and Transmissions
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- General Industrial Machinery requiring high-speed rotation
