<p>Multiple coaxial helically actuated disc brake including multiple pressure plate rotationally actuated and helically guided by support structure to axially engage a brake pad earner and rotor Pressure plate, brake pad earner and rotor are coaxial with the rotating member upon which the coaxial disc brake acts A low friction device, matepal or element is applied between pressure plate and adjacent pad earner stator Multiple rotary actuators are mounted on the support structure and coupled to rotate the pressure plate through a dpve arranged to remain coupled throughout a range of axial movement of the pressure plate that permits the entire stack of rotors and stators to be engaged Dual-motor actuators provide fail-safe redundancy.</p>
