In a traditional machining center, the work piece is clamped in a fixed position and the tool is loaded for machining by the tool changer in the main spindle. But in a transfer center the components can be (milled, drilled, threaded etc.) processed with just one set-up. The processing method of the work piece is therefore the opposite than in a traditional machining center. Work pieces are automatically clamped into position and are then moved, controlled by the CNC, from one tool to another. So this offer the possibility that multiple work pieces are can be machined simultaneously.