Mechanical jack

A mechanical jack (10**) comprising a casing (11**) which encloses a reduction unit (12**) and a linear actuator device (13**). The jack (10**) is characterized by the fact that the driven gear (14**) of the reduction unit (12**) is directly coupled, i.e. without the interposition of further mechanical elements, with a nut or more nuts (19**) of the linear actuator device (13*, 13**).