{"data":{"fields":"term_definition","term_definition":"<div class=\"definition\">A chuck used to hold a bevel or hypoid gear during process grinding, in which three or more approximately equally spaced fingers engage the teeth of the gear being processed at or close to the pitch line, near the middle of the gear face width, and position the gear pitch circle accurately in the grinding machine.<\/div><div class=\"align align-image align-left\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"><img src=\"https:\/\/www.gleason.com\/images\/Rg17j2.d7e2\/544w\/pchuck.jpg\" alt=\"pchuck\"><\/div>"}}