 The crossing point is the point of intersection of bevel gear axes; also the apparent point of intersection of the axes in hypoid gears, crossed helical gears, worm gears, and offset face gears, when projected to a plane parallel to both axes.The crown circle in a bevel or hypoid gear is the circle of intersection of the back cone and face cone.Crowned teeth have surfaces modified in the lengthwise direction to produce localized contact or to prevent contact at their ends.