{"data":{"fields":"term_definition","term_definition":"<div class=\"definition\">Refers to a machine in which a gear box with assembled gears can be mounted and operated under load at slow speed. Such a machine is used to measure gear and mounting diplacements and deflections and to observe the behavior of the tooth contact pattern under all operating loads. The machine generally consists of a drive motor and reduction gear box driving the test gear box which is loaded by a calibrated brake for measuring the load.<\/div>"}}