Assertion: ball bearing | /r/MadeOf | ball
Facets:
value: with smooth metal surfaces
type: OTHER
Source sentences:
text: Ball bearings consist of balls (rolling elements), the inner ring, the outer ring, the cage (for keeping the balls in appropriate motion), and are used for many machines requiring rotary shafts, such as motors equipped in electric tools, etc.
text: Ball bearings consist of a number of balls held within two circular rails and can handle a comparatively lower amount of thrust.
text: It consists of balls with smooth metal surfaces that aid in rolling.