Hysteresis clutch or brake consisting of: a first hub assembly which is equipped with at least one fixed hysteresis ring (1.2) and a second hub assembly, which is rotatably mounted concentrically to the first hub assembly, arranged fixed in the axial direction and equipped with a fixedly built in magnet carrier (2.5) furnished with block magnets (2.6) or with a magnetic ring (2.4.), wherein an annular air gap is formed between the at least one hysteresis ring (1.2.) and the block magnetics (2.6) or the magnetic ring (2.4), wherein by the axial fixation between the first and the second hub assembly (1, 2) defines a fixed axial overlap between the at least one hysteresis ring (1.2) and the block magnets (2.6) or the magnet ring (2.4) and thereby a fixed transferable torque of the hysteresis clutch or brake, wherein after the attachment of the at least one hysteresis ring (1.2) to the first hub assembly and the block magnets (2.6) or the magnet ring (2.4) to the second hub assembly none of the components, that is to say the at least one hysteresis ring (1.2) on the one hand and the block magnets (2.6) or magnet ring (2.4) on the other hand, completely covers the other component in the axial direction thus achieving a predefined slip torque of the clutch or brake, and wherein the first hub assembly comprises a bell-shaped first hub part (1.1), characterized in that the second hub assembly comprises a likewise bell-shaped second hub part (2.1), which is arranged concentrically within the first hub assembly, and that the axial position of the magnetic ring (2.4) or of the block magnets (2.6) equipped magnetic carrier (2.5) on the second hub part (2.1) is defined by a sealing and stop element screwed to a thread of the second hub part and fixedly attached thereto wherein the magnetic ring (2.4) or the magnetic carrier (2.5) is pushed to the stop of the stop and sealing element, and the magnetic ring (2.4) or the block magnets (2.6) equipped magnetic carrier (2.5) is firmly bonded with the second hub part (2.1), wherein the sealing and stop element forms a concentric seal gap with the first hub part. a first hub assembly which is equipped with at least one fixed hysteresis ring (1.2) and a second hub assembly, which is rotatably mounted concentrically to the first hub assembly, arranged fixed in the axial direction and equipped with a fixedly built in magnet carrier (2.5) furnished with block magnets (2.6) or with a magnetic ring (2.4.), wherein an annular air gap is formed between the at least one hysteresis ring (1.2.) and the block magnetics (2.6) or the magnetic ring (2.4), wherein by the axial fixation between the first and the second hub assembly (1, 2) defines a fixed axial overlap between the at least one hysteresis ring (1.2) and the block magnets (2.6) or the magnet ring (2.4) and thereby a fixed transferable torque of the hysteresis clutch or brake, wherein after the attachment of the at least one hysteresis ring (1.2) to the first hub assembly and the block magnets (2.6) or the magnet ring (2.4) to the second hub assembly none of the components, that is to say the at least one hysteresis ring (1.2) on the one hand and the block magnets (2.6) or magnet ring (2.4) on the other hand, completely covers the other component in the axial direction thus achieving a predefined slip torque of the clutch or brake, and wherein the first hub assembly comprises a bell-shaped first hub part (1.1), characterized in that the second hub assembly comprises a likewise bell-shaped second hub part (2.1), which is arranged concentrically within the first hub assembly, and that the axial position of the magnetic ring (2.4) or of the block magnets (2.6) equipped magnetic carrier (2.5) on the second hub part (2.1) is defined by a sealing and stop element screwed to a thread of the second hub part and fixedly attached thereto wherein the magnetic ring (2.4) or the magnetic carrier (2.5) is pushed to the stop of the stop and sealing element, and the magnetic ring (2.4) or the block magnets (2.6) equipped magnetic carrier (2.5) is firmly bonded with the second hub part (2.1), wherein the sealing and stop element forms a concentric seal gap with the first hub part.