SKF 61903-2RS1 High-Performance Sealed Ball Bearing
The SKF 61903-2RS1 is a premium thin section deep groove ball bearing that engineers primarily select for applications where radial space is extremely limited. Firstly, this model offers a highly compact profile without sacrificing the exceptional rotational accuracy and durability expected from SKF. It belongs to the single-row deep groove category, which provides versatile performance for lightweight industrial components and precision machinery.
Technical Dimensions and Reliable Performance
In addition to its space-saving geometry, the 61903-2RS1 features very precise physical dimensions. It has a bore diameter of 17 mm, an outside diameter of 30 mm, and a width of 7 mm. Regarding its structural strength, the bearing offers a basic dynamic load rating of 4.62 kN and a basic static load rating of 2.55 kN. Furthermore, it reaches a dependable limiting speed of 14,000 r/min. Therefore, this model serves as an ideal solution for machinery where weight reduction and size remain critical factors for overall efficiency.
Key Features and 2RS1 Contact Sealing
Specifically, the “2RS1” designation indicates that the bearing features sheet-steel reinforced contact seals on both sides. These rubber seals provide a much higher level of protection against moisture, dust, and environmental contamination compared to standard metal shields. Because the seals maintain direct contact with the inner ring, they effectively lock the high-quality grease inside the bearing raceways. Moreover, the use of premium bearing steel and a robust sheet metal cage ensures excellent structural integrity under continuous operation.
Additionally, this bearing features a cylindrical bore type and standard radial internal clearance (CN). The design does not include filling slots or a locating feature on the outer ring, which keeps the total mass at a lightweight 0.0167 kg. As a result, the configuration minimizes rotational friction and supports higher energy efficiency in precision systems.
Common Industrial and Commercial Applications
Because of its unique thin-walled profile and durable sealed design, the SKF 61903-2RS1 is vital across many specialized sectors. For example, robotics, precision tools, electric motors, and high-performance bicycle hubs frequently rely on this specific thin-section model. Finally, the pre-greased and sealed configuration supports smooth, maintenance-free movement throughout the entire lifecycle of the component. This makes it a top-tier choice for designers who prioritize space efficiency and long-term protection against the elements.
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