BALL BEARING

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A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the races. The primary function of a ball bearing is to lessen rotational friction and support radial and axial loads by using at least two races to house the balls, which transmit the load through them. In most applications, one race remains stationary while the other is connected to the rotating component (e.g., a hub or shaft). The rotation of one race causes the balls to spin as well due to their low coefficient of friction compared to sliding surfaces. Despite having lower load capacity for their size than other rolling-element bearings, ball bearings can tolerate some misalignment between inner and outer races. The first modern ball-bearing design was created by Philip Vaughan in 1794, followed by the introduction of radial style ball bearing by Jules Suriray in 1869, which was used on James Moore's winning bicycle in the world's first bicycle road race, Paris-Rouen.