Abstract: A double acting fluid pressure operated linear motor has an extruded cylinder member with a head endwall and mounting tang formed integrally thereon and has an annular step formed in the interior chamber at the rod end. A piston within the cylinder member is connected to a rod which extends through an end cap fitted against the annular step, the ends of the cylinder member being deformed inwardly to retain the end cap, rod and piston in place. This construction enables such devices to be manufactured extremely economically so that it is practical to discard and replace the actuator, if necessary, rather than performing repairs.