Braking device (10, 60) comprising: * a calliper (11, 61) intended to run along a friction track of a component that may require braking, * a housing (12, 62) in this calliper having a given axis and with hydraulic connection ports (13A, 13B, 63A, 63B) opening into the bottom thereof, which are intended to allow application of a braking pressure in said housing, one (13A, 63A) of these hydraulic connection ports being located in a central position relative to this bottom of the housing, * a piston (14, 64) mounted so that it slides in this housing, and equipped at one end with a brake pad (17, 67) intended to come into contact with said friction track and comprising a cavity (18, 68) opening at the other end opposite the bottom of the housing, this cavity having an axial dimension substantially smaller than the axial dimension of this piston, characterized in that the braking device comprises: * a hollow central rod (21, 71) fixed to the bottom of this housing in the prolongation of the hydraulic connection port (13A, 63A) located in a central position and comprising a shouldered head (22, 72) at one end located inside the cavity, and * a stack of Belleville washers (23, 73) compressed between this shouldered head and a flange (19, 69) that projects relative to the inside wall of the cavity, radially towards the central rod, and integral with this piston, this stack being designed to ensure full backward travel of the piston towards the bottom of the housing, until it is in a configuration in abutment with respect to the bottom of the calliper, when the braking pressure applied via said ports falls below a specified threshold. * a calliper (11, 61) intended to run along a friction track of a component that may require braking, * a housing (12, 62) in this calliper having a given axis and with hydraulic connection ports (13A, 13B, 63A, 63B) opening into the bottom thereof, which are intended to allow application of a braking pressure in said housing, one (13A, 63A) of these hydraulic connection ports being located in a central position relative to this bottom of the housing, * a piston (14, 64) mounted so that it slides in this housing, and equipped at one end with a brake pad (17, 67) intended to come into contact with said friction track and comprising a cavity (18, 68) opening at the other end opposite the bottom of the housing, this cavity having an axial dimension substantially smaller than the axial dimension of this piston, * a hollow central rod (21, 71) fixed to the bottom of this housing in the prolongation of the hydraulic connection port (13A, 63A) located in a central position and comprising a shouldered head (22, 72) at one end located inside the cavity, and * a stack of Belleville washers (23, 73) compressed between this shouldered head and a flange (19, 69) that projects relative to the inside wall of the cavity, radially towards the central rod, and integral with this piston, this stack being designed to ensure full backward travel of the piston towards the bottom of the housing, until it is in a configuration in abutment with respect to the bottom of the calliper, when the braking pressure applied via said ports falls below a specified threshold.