Device for tensioning a connecting element

A device for tensioning a connecting element fastened to a component to be tightened, comprising an engagement element connectable to the connecting element, and an actuating unit for translating a rotational movement applied to an actuating element into a translational movement of the engagement element relative to the component, wherein

• the device further comprises a gear unit configured to transform an input torque applied to a transmission input element into an output torque applied to the actuating element which absolute value is higher compared to the input torque;
• and
• wherein the gear unit comprises a reaction arm coupled to the engagement element such that a transitional movement of the reaction arm relative to the engagement element is enabled and a rotational movement of the reaction arm relative to the engagement element is locked.