{"data":{"fields":"term_definition","term_definition":"<div class=\"definition\">The change gears used in the generating train on generators and grinders to control the relative rate of rotation of the generating gear (cradle) to that of the gear being generated.<\/div><div class=\"align align-image align-left\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"><img src=\"https:\/\/www.gleason.com\/images\/UNSJTW.a48a\/nocrop\/Ratio_of_Roll_Gears.gif\" alt=\"Ratio_of_Roll_Gears\"><\/div>"}}