Brake disc chamfer comparison gauge

The utility model discloses a brake disc chamfer comparison testing fixture which comprises a base, the upper surface of the base is provided with a placement groove, the interior of the placement groove is fixedly connected with a second motor, the output end of the second motor is fixedly connected with a rotating disc, the surface of the rotating disc is provided with a fixing cavity, and the fixing cavity is provided with a clamping groove. Second electric push rods are symmetrically arranged in the fixing cavity, a fixing plate is fixedly connected to one side of each second electric push rod, a mounting seat is fixedly connected to one side of the base, a mounting groove is formed in the surface of the mounting seat, and a first motor is fixedly connected to the interior of the mounting groove; an output shaft of the first motor is fixedly connected with a threaded rod, and the outer surface of the threaded rod is in threaded connection with a threaded block. The second motor and the rotating disc are a