SKF 618-9 High-Precision Thin Section Ball Bearing
The SKF 618-9 is a high-precision thin section deep groove ball bearing that engineers primarily use in applications with limited space. Firstly, this bearing offers a compact design without sacrificing rotational accuracy or speed. It belongs to the single-row deep groove category, which provides versatile performance for lightweight industrial components.
Technical Dimensions and High-Speed Performance
In addition to its space-saving design, the 618-9 features very specific and delicate dimensions. It has a bore diameter of 9 mm, an outside diameter of 17 mm, and a width of only 4 mm. Regarding its performance capabilities, the bearing supports a basic dynamic load rating of 0.871 kN and a basic static load rating of 0.34 kN. Furthermore, it reaches an impressive limiting speed of 53,000 r/min. Therefore, this model serves as an excellent choice for high-speed machinery where weight and size remain critical factors.
Material Properties and Open Design
Specifically, the 618-9 features an open design without seals or shields. This allows for easy integration into oil-lubricated systems or environments where the user provides custom lubrication. Because it utilizes high-quality bearing steel, the unit maintains excellent structural integrity even at high rotational speeds. Moreover, the cylindrical bore type and standard radial internal clearance (CN) ensure a stable and predictable fit for precision shafts.
Additionally, this bearing does not include filling slots or a locating feature on the outer ring. This streamlined “Thin Section” geometry reduces the overall mass of the component to just 0.0038 kg. As a result, the design significantly lowers the rotational inertia, allowing the machinery to accelerate and decelerate more efficiently.
Common Industrial Applications
Because of its unique size, the SKF 618-9 is widely used in specialized sectors. For example, medical instruments, high-end bicycles, precision robotics, and optical equipment frequently rely on this thin-section model. Finally, the open configuration supports smooth, low-friction movement in clean environments. This makes it a top-tier selection for engineers who prioritize precision and space efficiency.
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