Brake and actuation units for braking

The brake system (12) has the metallic bellow (72) that is provided with an opening (112) in the interior. A brake element (116) is connected with the bellows. A brake disc (22) is spaced apart from the brake element, a fluid storage unit (86) or a compression unit (84). The channels (96,98) are connected between the fluid storage unit, the compression unit and the opening. An independent claim is included for an actuator unit.