Dc motor

A brushed DC motor for a starter of an internal combustion engine, the DC motor comprising:

• a housing having a hollow cylindrical portion in which a bearing is fixed, the cylindrical portion having an axial end surface;
• a motor shaft rotatably supported by the housing via the bearing, the motor shaft having a protruding portion that protrudes from the cylindrical portion of the housing so as to be located outside the housing, the motor shaft also having an annular groove formed in an outer circumferential surface of the protruding portion;
• a cap mounted to the cylindrical portion of the housing to cover the protruding portion of the motor shaft, the cap having an opposing surface opposed to the axial end surface of the cylindrical portion of the housing;
• a restricting member mounted in the annular groove of the motor shaft and fixed between the axial end surface of the cylindrical portion of the housing and the opposing surface of the cap to restrict axial movement of the motor shaft;
• and
• a spacer interposed, in a state of having been plastically deformed in an axial direction of the motor shaft during the mounting of the cap to the cylindrical portion of the housing, between the opposing surface of the cap and the restricting member in the axial direction.