Assertion: ball bearing's ball | /r/CapableOf | reduce friction
Facets:
value: because of dissimilar materials
type: CAUSE
value: by their shape
type: OTHER
value: by finish
type: MANNER
Source sentences:
text: An example of this is where the cage is made of plastic, and it separates the rollers/balls, which reduce friction by their shape and finish.
text: The ceramic balls reduce friction and are resistant to static vibration because of there dissimilar materials again reducing wear and tear of the materials.