The invention relates to a clamping system 9, 10 for clamping a workpiece, in particular for cutting of a workpiece clamped in a machining center. The clamping system 9, 10 according to the invention has one carriage guide 11 and two carriages 12, 13 and 14, 15, which carriages are movable within the carriage guide 11, Each has a clamping jaw receiving portion for mounting the clamping jaws. The clamping system 9, 10 according to the invention also comprises a clamping spindle 24, 25 rotatably mounted, which clamps the two carriages 12, 13 and 14, 15. In order to clamp relative to each other corresponding to the rotational positions of 24, 25, one side is engaged with the first carriage 13, 14 and the other with the second carriage 12, 15. In addition, the clamping systems 9, 10 according to the invention have a third clamping jaw receiver which is positioned for mounting the clamping jaws. Thus, the first workpiece can be clamped between the first clamping jaw and the intermediate clamping jaw while the second workpiece can be clamped between the second clamping jaw and the intermediate clamping jaw. Furthermore, the clamping systems 9, 10 according to the invention enable a "third hand" function. The clamping system 9, 10 according to the invention is characterized in that the slides 26, 27 are now movable along the carriage guide 11, in which case the slides 26, 27 are rotatably mounted adjustments. It is movable by the spindles 28 and 29. The slides 26, 27 interact with the first carriages 13, 14 and define a specific free movement space of the first carriages 13, 14 relative to the slides 26, 27, resulting in the slide 26. , 27 forms a stop for the first carriages 13, 14 at the boundary of the free space of movement, in order to enable the "third hand" function.
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