Support for the end pin of a shaft, comprising: - a tube suited to be associated with a supporting structure; - a primary shaft defining a main longitudinal axis, coaxially coupled inside said tube and suited to be associated with power means suited to set it rotating according to said main longitudinal axis; - a prismatic seat with open profile created in the end of said primary shaft projecting from said tube and configured in such a way that it houses said end pin of said shaft; - a flange slidingly coupled with said tube and with said projecting end of said primary shaft and associated with a shaped cap; - moving means suited to move said flange with respect to said tube and to said projecting end of said primary shaft between: - a first position, in which said flange is axially spaced from said tube according to said main longitudinal axis and said shaped cap is superimposed to said prismatic seat and - a second position, in which said flange is positioned against said tube and said shaped cap is arranged at the side of said prismatic seat; - locking means belonging to said flange and to said projecting end of said primary shaft, configured in such a way as to constrain said flange to said projecting end of said primary shaft in said first position, characterized in that it comprises: - two manoeuvring rods (20, 21) slidingly housed in corresponding guide channels (22, 23) made in said flange, each one of said manoeuvring rods (20, 21) being provided with a first end (20a, 21a) configured so as to cooperate with said locking means and a second end (20b, 21b) projecting from said flange and at the disposal of the operator for moving said manoeuvring rod (20, 21) along the corresponding guide channel (22, 23). - a tube suited to be associated with a supporting structure; - a primary shaft defining a main longitudinal axis, coaxially coupled inside said tube and suited to be associated with power means suited to set it rotating according to said main longitudinal axis; - a prismatic seat with open profile created in the end of said primary shaft projecting from said tube and configured in such a way that it houses said end pin of said shaft; - a flange slidingly coupled with said tube and with said projecting end of said primary shaft and associated with a shaped cap; - moving means suited to move said flange with respect to said tube and to said projecting end of said primary shaft between: - a first position, in which said flange is axially spaced from said tube according to said main longitudinal axis and said shaped cap is superimposed to said prismatic seat and - a second position, in which said flange is positioned against said tube and said shaped cap is arranged at the side of said prismatic seat; - a first position, in which said flange is axially spaced from said tube according to said main longitudinal axis and said shaped cap is superimposed to said prismatic seat and - a second position, in which said flange is positioned against said tube and said shaped cap is arranged at the side of said prismatic seat; - locking means belonging to said flange and to said projecting end of said primary shaft, configured in such a way as to constrain said flange to said projecting end of said primary shaft in said first position, - two manoeuvring rods (20, 21) slidingly housed in corresponding guide channels (22, 23) made in said flange, each one of said manoeuvring rods (20, 21) being provided with a first end (20a, 21a) configured so as to cooperate with said locking means and a second end (20b, 21b) projecting from said flange and at the disposal of the operator for moving said manoeuvring rod (20, 21) along the corresponding guide channel (22, 23).