A rotating machining device includes a segmented support housing arranged to be mounted on a work piece and a segmented headstock mounted on the support housing and rotatable relative to the support housing about an axis. The encapsulant has chlorides and a negatively-charged corrosion inhibitor for preventing corrosion of the conductive structure. Ends of slat-support guides are affixed intermediate the ends of both the inward edges of the slanted slats and the outward edges of the slanted slats. The refraction index of the microstructure is 1. An impact absorbing element is positioned at each end of the tube.