2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/115664We consider the Stäckel transform, also known as the coupling-constant metamorphosis, which under certain conditions turns a Hamiltonian dynamical system into another such system and preserves the Liouville integrability. We show that the corresponding transformation for the equations of motion is nothing but the reciprocal transformation of a special form and we investigate the properties of this transformation. This result is further applied for the study of the $k$-hole deformations of the Benenti systems or more general seed systems.12 pages, no figuresExactly Solvable and Integrable SystemsMathematical PhysicsSymplectic Geometrytext