Abstract: A tension device with two preferably disc- or plate-shaped brake elements forced against one another by load devices and between which at least one thread to be braked can be led through. The brake elements are mounted on a bearing of a common bearing axle and capable of rotating freely about the bearing axle. The tension devise is provided with at least one magnetic loading device mounted on one of the two brake elements and at least one other magnetic loading device separate from the brake element with the magnetic loading device by which the brake elements are forced axially against one another.