Definitions for ball bearing
Random House Webster's College Dictionary
a bearing consisting of a number of hard balls running in grooves in the surfaces of two concentric rings, one of which is mounted on a rotating or oscillating shaft.
a ball so used.
ball bearing, needle bearing, roller bearing(noun)
bearings containing small metal balls
In engineering, a bearing assembly which uses spherical bearing balls as the rolling elements
In common usage, an individual spherical ball, usually made of steel or other hard material, suitable for use in a ball-based rolling element bearing
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