A method of manufacturing a hinged device (70, 170, 270) of a medical instrument (60, 160, 260, 360) comprising the following steps: (a) providing a machining tool (112) in an electrical discharge machine the electric discharge wire (115), said machining tool (112) comprising a plurality of member holes (116) adapted to accommodate at least one part (117), said part (117) being adapted to forming at least a portion of said hinged device (70, 170, 270) of said medical instrument (60, 160, 260, 360)； (b) providing at least two pieces (117), comprising a first piece and a second piece, accommodated within at least two member holes (116) of said plurality of member holes (116)； (c) associating said machining tool (112) with the wire discharge machine so that said wire discharge (115) can cut at most one of said at least two pieces (117) in time； (d) cutting said at least two pieces (117) by means of said electric discharge wire (115)； (e) rotating the machining tool (112) about a tool rotation axis (rr) at a predetermined tool rotation angle, said predetermined rotation angle being chosen such that said wire discharge (115) can cut at most one of at least two pieces (117) at a time； (f) cutting said parts (117) by means of said electric discharge wire.método de fabricação de um dispositivo articulado (70, 170, 270) de um instrumento médico (60, 160, 260, 360) compreendendo os passos a seguir: (a) fornecer um ferramenta de usinagem (112) em uma máquina de descarga elétrica por fio, o fio de descarga elétrica (115), a dita ferramenta de usinagem (112) compreendendo uma pluralidade de orifícios de membros (116) adaptados para acomodar ao menos uma peça (117), a dita peça (117) sendo adaptada para formar ao menos uma porção da dito dispositivo articulado (70, 170, 270) de dito instrumento médico (60, 160, 260, 360)； (b) fornecer ao menos duas peças (117), compreendendo uma primeira peça e uma segunda peça, acomodadas no interior de ao menos dois orifícios de membro (116) de
