The segmented clamping bushing SE with the hexagon socket sits on the clamping pyramid, absolutely form-fitted in every clamping position and thereby enables maximum machining performance with minimal vibration and thus less tool wear. The full-surface contact of the segmented clamping bushing on the mandrel ensures a significantly better insensitivity to contamination than previous segmented clamping bushing/mandrel systems. Therefore, these segmented clamping bushings are even better suited for raw material, cast and forged parts, as well as fine-particle non-ferrous metals such as brass. And they offer this suitability at run-out of ? 0.01 mm and in the premium version at ? 0.007 mm.