{"data":{"fields":"term_definition","term_definition":"<div class=\"definition\">An imaginary rack with a plane pitch surface rolling simultaneously with both pitch cylinders of two conjugate gears. Any gear which runs with one side of the rack will also operate with any gear which runs with the other side of the rack, provided their pitch cylinders are tangent.<\/div><div class=\"align align-image align-left\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"><img src=\"https:\/\/www.gleason.com\/images\/hnOxfj.cf54\/544w\/BasePitch.jpg\" alt=\"BasePitch\"><\/div>"}}