Bearing raceway measuring device

The utility model discloses a bearing raceway measuring device, which comprises a base, the upper part of the base is connected with a rotating disk through a worm and gear reducing motor, a vertical shaft is arranged at the upper part of the rotating disk in the axial direction, and a fixed sleeve coaxial with the vertical shaft is arranged at the upper part of the rotating disk; at least three jacking plates which are arranged at equal angles are arranged on the inner side of the fixing sleeve in a radial sliding mode, inclined faces are arranged at the ends, close to the vertical shaft, of the jacking plates, the vertical shaft is sleeved with a conical head, the vertical shaft is further in threaded connection with a pressing nut which presses the conical head downwards, and under the pressing effect of the pressing nut, the outer conical face of the conical head is matched with the inclined faces of the jacking plates. And the plurality of jacking plates are radially far away from the vertical shaft, so