The component in a disk brake unit acts as a return spring and allows the pad to move a ay from the rotor is the

The component in a disk brake unit acts as a return spring and allows the pad to move away from the rotor is the Square cut seal or Caliper piston seal. This is the component in the brake caliper which acts as a retracting mechanism in the piston when hydraulic pressure is released. It functions as a return spring to retract the piston.