A simulation device for the screw joint simulation of a screw-driving tool; comprising a test connecting unit by which the screw-driving tool can be coupled to the simulation device, wherein said screw-driving tool can be activated and, in the activated state and coupled to the test connecting unit, rotates the test connecting unit about an axis of rotation and exerts a torque onto the test connecting unit; comprising a measuring unit for measuring the torque that the screw-driving tool in the activated state and coupled to the test connecting unit exerts onto said test connecting unit and for measuring the angle of rotation by which the test connecting unit is rotated about the axis of rotation by the activated screw-driving tool in the coupled state; and comprising a brake unit for slowing down the torque that the screw-driving tool in the activated state and coupled to the test connecting unit exerts onto the test connecting unit; wherein said simulation device comprises a converter unit, which converter unit is mechanically connected to the test connecting unit, which converter unit captures the torque that the screw-driving tool in the activated state and coupled to the test connecting unit exerts onto the test connecting unit and converts said torque into a braking force and applies the braking force to the brake unit; characterized in that said converter unit comprises a spindle (14.1) and a nut (14.2), which spindle (14.1) and which nut (14.2) are connected to one another via a form fit, by which form fit a rotational movement of the spindle (14.1) about the axis of rotation is converted into a longitudinal movement of the nut (14. 2) along the axis of rotation; and in that said nut (14.2) that is moved along the axis of rotation converts a torque that the screw-driving tool in the activated state and coupled to the test connecting unit exerts onto the test connecting unit into a braking force and applies the braking force to the brake unit; in that said converter unit comprises rolling elements (14.5); in that the spindle (14.1) is a threaded spindle; in that the nut (14.2) is a threaded nut; in that the rolling elements (14.5) generate the form fit between the threaded spindle (14.1) and the threaded nut (14.2); and in that the rolling elements (14.5) converts the rotational movement of the threaded spindle (14.1) about the axis of rotation in the longitudinal movement of the threaded nut (14.2) along the axis of rotation. comprising a test connecting unit by which the screw-driving tool can be coupled to the simulation device, wherein said screw-driving tool can be activated and, in the activated state and coupled to the test connecting unit, rotates the test connecting unit about an axis of rotation and exerts a torque onto the test connecting unit; comprising a measuring unit for measuring the torque that the screw-driving tool in the activated state and coupled to the test connecting unit exerts onto said test connecting unit and for measuring the angle of rotation by which the test connecting unit is rotated about the axis of rotation by the activated screw-driving tool in the coupled state; and comprising a brake unit for slowing down the torque that the screw-driving tool in the activated state and coupled to the test connecting unit exerts onto the test connecting unit; wherein said simulation device comprises a converter unit, which converter unit is mechanically connected to the test connecting unit, which converter unit captures the torque that the screw-driving tool in the activated state and coupled to the test connecting unit exerts onto the test connecting unit and converts said torque into a braking force and applies the braking force to the brake unit; characterized in that said converter unit comprises a spindle (14.1) and a nut (14.2), which spindle (14.1) and which nut (14.2) are connected to one another via a form fit, by which form fit a rotational movement of the spindle (14.1) about the axis of rotation is converted into a longitudinal movement of the nut (14. 2) along the axis of rotation; and in that said nut (14.2) that is moved along the axis of rotation converts a torque that the screw-driving tool in the activated state and coupled to the test connecting unit exerts onto the test connecting unit into a braking force and applies the braking force to the brake unit; in that said converter unit comprises rolling elements (14.5); in that the spindle (14.1) is a threaded spindle; in that the nut (14.2) is a threaded nut; in that the rolling elements (14.5) generate the form fit between the threaded spindle (14.1) and the threaded nut (14.2); and in that the rolling elements (14.5) converts the rotational movement of the threaded spindle (14.1) about the axis of rotation in the longitudinal movement of the threaded nut (14.2) along the axis of rotation.