Patent ID: 7743484

Claim:
A method of manufacturing a rotor shaft including a rotor that includes a rotor core constituted by laminated steel sheets in a hollow cylindrical shape and an end plate disposed on an end face of the rotor core, and a shaft having a groove formed on a periphery to open radially outwardly, the rotor being fixed to the shaft through a fixing member disposed in a predetermined place in contact with the periphery of the shaft including the groove and adjacent the rotor in an axial direction thereof, wherein the fixing member includes an insertion part formed with an insertion hole in which the shaft is to be inserted and a disc part which will contact with the end plate, and the method comprising the step of: caulking the fixing member to fix the rotor to the shaft by applying a load to an end of the fixing member from outside in a radial direction, opposite the groove, when the fixing member is disposed in the predetermined place, causing a part of the insertion part of the fixing member to be press-fitted into the groove, the caulking and fixing step including pressing a caulking jig against the fixing member from outside in a radial direction of the shaft, thereby fixing the rotor to the shaft.