To generate predetermined motion of a driving shaft 3 along a longitudinal direction axis Y of a pneumatic/hydraulic actuator.

The pneumatic/hydraulic actuator comprises a container body 2, and the driving shaft 3 inserted in a cylindrical housing or a through-hole of the container body, the driving shaft being mobile along the longitudinal axis Y of the actuator and pneumatically and/or hydraulically operated. The actuator has the through-hole situated on the container body and substantially orthogonal to the moving axis of the shaft. A cylinder 7 is integrated to the through-hole, operating to stop the run of the driving shaft.