10PCS MR117-2RS Bearing 7x11x3mm Double Sealed Blue RC Motor Miniature MR117 RS Ball Bearing MR117 2RS

Magnetic BearingsBearingWhat is a Ball Bearing?The Function of Ball BearingsFrom small and large motors to car axles to electric fans and hard disc drives (HDDs),ball bearings are used in a wide array of machines for rotary motion.Ball bearings support rotary parts and reduce friction to facilitate the smoothoperation of machines. Ball Bearing ComponentsBall bearings are comprised of four major parts: a large ring (outer ring), a smallring (inner ring), balls between the rings (steel balls), and a cage to prevent theballs from hitting each other. The modern structure dates back to around 1500, whenLeonardo da Vinci invented ball bearings to reduce friction against the axles ofhorsedrawn carts. For more than 500 years, the ball bearing has been defined by this simple structure.

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