A manufacturing machine for the production of disposable cartridges for electronic cigarettes; the manufacturing machine comprises: a manufacturing drum (9; 13) which is mounted rotating in a stepwise manner around a first vertical rotation axis (10; 14) and supports at least one group (11; 15) of first seats (12; 16), each of which is adapted to receive a corresponding component (2; 7) of the disposable cartridge; and a feeding unit (17; 21), which feeds corresponding components (2; 7) of the disposable cartridges to the first seats (12; 16) of a group (11; 15) of first seats (12; 16) standing still at the feeding unit (17; 21) itself; the manufacturing machine is characterized in that: the feeding unit (17; 21) comprises a feeding drum (28; 85), which is mounted rotating around a second rotation axis (29; 86) parallel to the first rotation axis (10; 14) and supports at least one group (30; 87) of fingers (31; 88) facing one another, each having at least a second seat (32; 89), which is adapted to receive a corresponding component (2; 7) of the disposable cartridge; the group (30; 87) of fingers (31; 88) is adapted to receive corresponding components (2; 7) of the disposable cartridge in an insertion station (S8; S9) and is adapted to release the components (2; 7) of the disposable cartridge to the group (11; 15) of first seats (12; 16) of the manufacturing drum (9; 13) in a feeding station (S1; S5); each finger (31; 88) is mounted on the feeding drum (28; 85) so as to move relative to the feeding drum (28; 85) in order to move away from or closer to the adjacent fingers (31; 88); and a first actuator device (33; 90) is provided, which moves the fingers (31; 88) so as to arrange the fingers (31; 88) at a first mutual distance in the insertion station (S8; S9) and at a second mutual distance, which is different from the first mutual distance, in the feeding station (S1; S5). a manufacturing drum (9; 13) which is mounted rotating in a stepwise manner around a first vertical rotation axis (10; 14) and supports at least one group (11; 15) of first seats (12; 16), each of which is adapted to receive a corresponding component (2; 7) of the disposable cartridge; and a feeding unit (17; 21), which feeds corresponding components (2; 7) of the disposable cartridges to the first seats (12; 16) of a group (11; 15) of first seats (12; 16) standing still at the feeding unit (17; 21) itself; the manufacturing machine is characterized in that: the feeding unit (17; 21) comprises a feeding drum (28; 85), which is mounted rotating around a second rotation axis (29; 86) parallel to the first rotation axis (10; 14) and supports at least one group (30; 87) of fingers (31; 88) facing one another, each having at least a second seat (32; 89), which is adapted to receive a corresponding component (2; 7) of the disposable cartridge; the group (30; 87) of fingers (31; 88) is adapted to receive corresponding components (2; 7) of the disposable cartridge in an insertion station (S8; S9) and is adapted to release the components (2; 7) of the disposable cartridge to the group (11; 15) of first seats (12; 16) of the manufacturing drum (9; 13) in a feeding station (S1; S5); each finger (31; 88) is mounted on the feeding drum (28; 85) so as to move relative to the feeding drum (28; 85) in order to move away from or closer to the adjacent fingers (31; 88); and a first actuator device (33; 90) is provided, which moves the fingers (31; 88) so as to arrange the fingers (31; 88) at a first mutual distance in the insertion station (S8; S9) and at a second mutual distance, which is different from the first mutual distance, in the feeding station (S1; S5). the feeding unit (17; 21) comprises a feeding drum (28; 85), which is mounted rotating around a second rotation axis (29; 86) parallel to the first rotation axis (10; 14) and supports at least one group (30; 87) of fingers (31; 88) facing one another, each having at least a second seat (32; 89), which is adapted to receive a corresponding component (2; 7) of the disposable cartridge; the group (30; 87) of fingers (31; 88) is adapted to receive corresponding components (2; 7) of the disposable cartridge in an insertion station (S8; S9) and is adapted to release the components (2; 7) of the disposable cartridge to the group (11; 15) of first seats (12; 16) of the manufacturing drum (9; 13) in a feeding station (S1; S5); each finger (31; 88) is mounted on the feeding drum (28; 85) so as to move relative to the feeding drum (28; 85) in order to move away from or closer to the adjacent fingers (31; 88); and a first actuator device (33; 90) is provided, which moves the fingers (31; 88) so as to arrange the fingers (31; 88) at a first mutual distance in the insertion station (S8; S9) and at a second mutual distance, which is different from the first mutual distance, in the feeding station (S1; S5).