Mechanical component, mechanical component manufacturing method, movement, and timepiece

A method of manufacturing a mechanical component rotating around a shaft member, comprising:

• a component main body having a through-hole through which the shaft member is passed;
• and a forcing-in portion formed on the inner surface of the through hole and fixed to the shaft member through the forcing-in of the shaft member, wherein, on the inner surface of the through-hole, there is formed a retaining recess constituting an anchor structure regulating displacement of the forcing-in portion with respect to the component main body by retaining at least a part of the forcing-in portion,
• the method comprising the steps of:
• forming, on at least one surface of a base member constituting the mechanical component a mask having an inner configuration corresponding to the configuration of the forcing-in portion and an outer configuration corresponding to the outer configuration of the component main body, and forming in the base member the retaining recess in conformity with the inner configuration of the mask;
• forming the forcing-in portion consisting of a metal material by electroforming so that at least a part thereof may be retained by the retaining recess;
• and
• removing an unnecessary portion of the base member in conformity with the outer configuration of the mask.