Changer device for clamping heads , having the following features: a. the changer device is configured for inserting a clamping head into a chuck and/or for removing the clamping head from the chuck, wherein the clamping head has a plurality of clamping jaws which in a radial direction are mutually repositionable and which by means of the changer device in the radial direction in a mutually converging or mutually diverging manner are impingable with a force, and b. the changer device possesses a base , and c. the changer device possesses a plurality of pivoting elements which are articulated so as to be pivotable on the base and which in each case possess at least one engagement portion for impinging the clamping jaws with a force, and d. the changer device possesses a coupling gearbox which per pivoting element possesses at least one coupling tab which is attached so as to be pivotably movable on the respective pivoting element , wherein the pivoting elements in terms of the movement thereof in relation to the base are coupled by way of the coupling tabs , and e. the changer device possesses a handle which for the purpose of the simultaneous repositioning of the pivoting elements is movable in relation to the base in a relative manner, characterized by the following feature: f. the handle is configured so as to be locationally fixed in relation to one of the coupling tabs such that a pivoting movement of the handle directly causes pivoting of said coupling tab and indirectly causes the pivoting of the at least one further coupling tab such that, on account thereof, a pivoting movement of the pivoting elements and of the engagement portions provided thereon is caused. a. the changer device is configured for inserting a clamping head into a chuck and/or for removing the clamping head from the chuck, wherein the clamping head has a plurality of clamping jaws which in a radial direction are mutually repositionable and which by means of the changer device in the radial direction in a mutually converging or mutually diverging manner are impingable with a force, and b. the changer device possesses a base , and c. the changer device possesses a plurality of pivoting elements which are articulated so as to be pivotable on the base and which in each case possess at least one engagement portion for impinging the clamping jaws with a force, and d. the changer device possesses a coupling gearbox which per pivoting element possesses at least one coupling tab which is attached so as to be pivotably movable on the respective pivoting element , wherein the pivoting elements in terms of the movement thereof in relation to the base are coupled by way of the coupling tabs , and e. the changer device possesses a handle which for the purpose of the simultaneous repositioning of the pivoting elements is movable in relation to the base in a relative manner, characterized by the following feature: f. the handle is configured so as to be locationally fixed in relation to one of the coupling tabs such that a pivoting movement of the handle directly causes pivoting of said coupling tab and indirectly causes the pivoting of the at least one further coupling tab such that, on account thereof, a pivoting movement of the pivoting elements and of the engagement portions provided thereon is caused. <EOS>