Assertion: bearing's surface | /r/HasProperty | convex
Facets:
Source sentences:
text: The Hertz theory is normally only valid when the surfaces can not conform, or in other terms, can not fit each other by elastic deformation; one surface must be convex, the other one must be also convex plane.
text: Hertzian stresses are present when any two surfaces with different radii are in contact — even if one surface is flat or if one surface is convex and the other is concave, which is the case for rolling element bearings: the ball or roller is convex, and the raceway is concave.