A method for mounting a shaft in a bearing track of an internal combustion engine, at least one sealing ring is mounted on the shaft such that the at least one sealing ring is widened and is pushed onto a region of the shaft, and at least one circumferential groove is formed on an external diameter of the shaft so that the sealing ring is arranged in the groove. The method may include positioning a calibrating tool having at least two clamping jaws over the at least one sealing ring, displacing the clamping jaws radial inward such that the at least one sealing ring is pushed onto the shaft in the region of the groove, and pressing the at least one sealing ring into the respective groove and force-fitting and form-fitting holding of the sealing ring in the groove.