{"data":{"fields":"term_definition","term_definition":"<div class=\"definition\">The imaginary cone in a bevel gear that rolls without slipping on a pitch cone or pitch plane of another gear. The base of the imaginary cone is in the plane of rotation at the gear crown and its apex is the gear pitch apex. In hypoid gears the pitch cones are tangent to one another only at the mean point and they do not roll without slipping.<\/div>"}}