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Roller Bearing

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The inner ring of a roller bearing is fastened to a rotating shaft. The outer ring is usually fixed to a stationary machine part (indicated with a transparent cylinder in this Demonstration). Alternatively, the inner ring may be stationary, and the outer ring rotating.

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The rollers run on the outside surface of the inner ring and also on the inner surface of the outer ring. The axes of the rollers follow a circular path (called the pitch circle), while all other points of the rollers follow various hypocycloids.

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Contributed by: Sándor Kabai (February 2008)
Open content licensed under CC BY-NC-SA

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