{"data":{"fields":"term_definition","term_definition":"<div class=\"definition\">The basic rack profile is the normal section through the teeth of a basic rack which corresponds to an external gear. The tooth of the basic rack profile is bounded by the tip line at the top and by the parallel root line at the bottom. The fillet between the straight tooth flank and the root line is usually of circular arc form.<\/div><div class=\"align align-image align-left\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"><img src=\"https:\/\/www.gleason.com\/images\/Le1lPp.3829\/544w\/ED-13c.jpg\" alt=\"ED-13c\"><\/div><div class=\"align align-image align-left\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"><img src=\"https:\/\/www.gleason.com\/images\/fTtkxj.543f\/544w\/ED-13d.jpg\" alt=\"ED-13d\"><\/div>"}}