Gear run-out tester

The invention relates to the technical field of metering tools, in particular to a gear run-out tester. The structure layout is more reasonable, the outer circle and end face size of the gear can be measured, the operation convenience is improved, meanwhile, the manual operation amount is reduced, and the gear detection efficiency and detection precision are effectively improved; comprising a rack, a jacking rotary supporting mechanism installed at the bottom of the rack, a limiting mechanism installed at the top of the rack and a detecting and metering mechanism used for detecting and metering the outer circle and the end face of a gear. The detecting and metering mechanism comprises a mounting plate, a rotating seat rotationally mounted on the mounting plate, a sleeve rotationally mounted at the position, close to the rack, of the rotating seat, a detecting rod slidably mounted in the sleeve, and a mounting seat fixedly mounted on the side, away from the rack, of the rotating seat; the first detection meter