Roller Bearing

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A rolling-element bearing, also known as a rolling bearing,[1] is a bearing which carries a load by placing rolling elements (such as balls or rollers) between two bearing rings. The relative motion of the pieces causes the round elements to roll with very little rolling resistance and with little sliding.
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Description

A rolling-element bearing, also known as a rolling bearing,[1] is a bearing which carries a load by placing rolling elements (such as balls or rollers) between two bearing rings. The relative motion of the pieces causes the round elements to roll with very little rolling resistance and with little sliding.