A device for the selective transmission of torques, said device comprising: - an inlet arranged to provide an inlet torque Q, said inlet comprising a transmission element arranged to rotate with speed ω about a rotation axis x; - a predetermined number m of outlets arranged to express, respectively, outlet torques T i, with i = 1,2,..., m, each outlet comprising a receiving element (110,110',110a,110b, 110a',110b') arranged to rotate with speed θ i about said rotation axis x; - a connection means arranged to pass between a disengagement configuration and an engagement configuration, in said disengagement configuration said inlet being disengaged by said or each outlet in such a way that Q ≠ T i and ω ≠ θ i, in said engagement configuration said inlet being engaged to a number n of outlets, with 1 ≤ n ≤ m, and said transmission element being connected by friction to a number n of respective receiving elements (110,110',110a,110b,110a',110b') in such a way that Q = ∑ i = 1 n T i and ω = θ 1 = θ 2 = ··· = θ n; said device further comprising at least: - a first outlet arranged to express an outlet torque T 1, said first outlet comprising a first receiving element arranged to rotate with speed θ 1 about said rotation axis x; - a second outlet arranged to express an outlet torque T 2, said second outlet comprising a second receiving element arranged to rotate with speed θ 2 about said rotation axis x. said device characterized in that said connection means comprise at least one rotating element (125,125a,125b) engaged to said transmission element and arranged to rotate about a rotation axis x' for causing said device to pass between said disengagement configuration, wherein said or each rotating element (125,125a,125b) is not in contact with said or each receiving element (110,110',110a,110b,110a',110b'), and said engagement configuration, wherein said or each rotating element (125,125a,125b) is clamped by friction to said or each receiving element (110,110',110a,110b,110a',110b'). - an inlet arranged to provide an inlet torque Q, said inlet comprising a transmission element arranged to rotate with speed ω about a rotation axis x; - a predetermined number m of outlets arranged to express, respectively, outlet torques T i, with i = 1,2,..., m, each outlet comprising a receiving element (110,110',110a,110b, 110a',110b') arranged to rotate with speed θ i about said rotation axis x; - a connection means arranged to pass between a disengagement configuration and an engagement configuration, in said disengagement configuration said inlet being disengaged by said or each outlet in such a way that Q ≠ T i and ω ≠ θ i, in said engagement configuration said inlet being engaged to a number n of outlets, with 1 ≤ n ≤ m, and said transmission element being connected by friction to a number n of respective receiving elements (110,110',110a,110b,110a',110b') in such a way that Q = ∑ i = 1 n T i and ω = θ 1 = θ 2 = ··· = θ n; - a first outlet arranged to express an outlet torque T 1, said first outlet comprising a first receiving element arranged to rotate with speed θ 1 about said rotation axis x; - a second outlet arranged to express an outlet torque T 2, said second outlet comprising a second receiving element arranged to rotate with speed θ 2 about said rotation axis x.