A brake device, to be installed on a driving axle comprising: - a first brake disc comprising: - a supporting disc assembled on the axle, configured to share rotation with said axle and to be moved in an axial direction with respect to the axle; - a first lining rigidly assembled on a first surface of the supporting disc; and - a second lining rigidly assembled on a second surface of the supporting disc; - a first container disc, configured to be moved only in the axial direction of said axle; and - a second container disc configured to be moved only in the axial direction of said axle or to remain stationary; wherein the first brake disc is positioned between the first container disc and the second container disc; wherein the first container disc is configured to be moved in the axial direction towards the first lining of the first brake disc; wherein, the first container disc is configured to exert a pushing pressure on the first lining in the axial direction, generating braking, and moving the first brake disc with respect to the axle towards the second container disc; wherein each container disc (3, 4) comprises an inner circuit configured to accommodate the passage of a coolant configured to cool it; the brake device characterized in that the supporting disc is formed by a cast iron part comprising: - a central disc through hole comprising the axial direction; - a plurality of fins arranged on the perimeter of the central disc through hole; and - at least one sliding joint accommodation, positioned on the perimeter of the central hole, comprising the axial direction; and wherein the brake device comprises at least one guide disc comprising: - a central through guide hole comprising the axial direction; - at least one guide shaft positioned in a position eccentric to the central guide hole and comprising the axial direction; wherein the guide disc is rigidly fastened to the axle and is assembled on a supporting disc in a joint sliding in the axial direction, the central guide hole being concentric to the central disc through hole; and wherein the at least one guide shaft is configured to be accommodated in the at least one accommodation of the supporting disc. - a first brake disc comprising: - a supporting disc assembled on the axle, configured to share rotation with said axle and to be moved in an axial direction with respect to the axle; - a first lining rigidly assembled on a first surface of the supporting disc; and - a second lining rigidly assembled on a second surface of the supporting disc; - a supporting disc assembled on the axle, configured to share rotation with said axle and to be moved in an axial direction with respect to the axle; - a first lining rigidly assembled on a first surface of the supporting disc; and - a second lining rigidly assembled on a second surface of the supporting disc; - a first container disc, configured to be moved only in the axial direction of said axle; and - a second container disc configured to be moved only in the axial direction of said axle or to remain stationary; wherein the first brake disc is positioned between the first container disc and the second container disc; wherein the first container disc is configured to be moved in the axial direction towards the first lining of the first brake disc; wherein, the first container disc is configured to exert a pushing pressure on the first lining in the axial direction, generating braking, and moving the first brake disc with respect to the axle towards the second container disc; wherein each container disc (3, 4) comprises an inner circuit configured to accommodate the passage of a coolant configured to cool it; - a central disc through hole comprising the axial direction; - a plurality of fins arranged on the perimeter of the central disc through hole; and - at least one sliding joint accommodation, positioned on the perimeter of the central hole, comprising the axial direction; and wherein the brake device comprises at least one guide disc comprising: - a central through guide hole comprising the axial direction; - at least one guide shaft positioned in a position eccentric to the central guide hole and comprising the axial direction; - a central through guide hole comprising the axial direction; - at least one guide shaft positioned in a position eccentric to the central guide hole and comprising the axial direction; wherein the guide disc is rigidly fastened to the axle and is assembled on a supporting disc in a joint sliding in the axial direction, the central guide hole being concentric to the central disc through hole; and wherein the at least one guide shaft is configured to be accommodated in the at least one accommodation of the supporting disc.