Abstract: A method and apparatus for machining of bores in workpieces is described, where a honing tool, covered with an abrasive material coating and radially pressed against the wall of the bore, simultaneously performs a rotational motion and an axial reciprocal motion. In addition to the reciprocal and rotational motions, the honing tool performs a high-frequency, short-stroke self-oscillation, which is excited by ultrasonic oscillation in the range of 16 to 40 kHz.

Abstract: A method for the manufacture of metal wires partially covered with abrasive particles for cutting tools such as, for example, brushing tools equipped with bristles, endless band saws equipped with sawing wires, and the like, is characterized by the following steps: at least one metal wire to be covered is put onto a holder; one or more covering elements are placed over those areas of the metal wire which are to be kept free of abrasive particles; the holder equipped with the metal wire and the covering element(s) is dipped into an electrolytic bath into which have been introduced abrasive particles, by which means the areas of the metal wire kept free on the holder are coated or covered with a layer of a metallic carrier substance with partial embedding of a plurality of abrasive particles through electrolytic metal deposition. In this manner it is possible to produce metal wires partially covered with abrasive particles and thus brushing tools and other cutting tools in a considerably more economic way.