Abstract: Cassette changing apparatus for index-feed machining systems having such a construction that a plurality of machining units, in which cassettes having machining means are provided, are disposed at predetermined intervals in the workpiece feeding direction in accordance with a plurality of machining processes; the cassette changing apparatus comprising a cassette transfer unit adapted to be movable in such a direction as to intersect with the workpiece feeding direction on a plane, and a cassette holder adapted to be approachable to and detachable from an index-feed machining system; a cassette being extracted from the index-feed machining system and housed in the cassette holder by means of the cassette transfer unit, and then another cassette holder housing a new cassette being moved to a loading position and mounted on the machining unit by means of the cassette transfer unit.

Abstract: The attachment is intended for use with a machine tool comprising rotary tool means and a rotary spindle for driving said tool means and comprises a shaft adapted to be connected to said spindle for rotation therewith, a rotary bearing carried by said shaft, a pantograph mounted on said bearing for an angular movement relative to said shaft about the axis thereof and adapted to carry said tool means at a distance from said axis, a tracer carried by said pantograph at a distance from said axis, and an angled drive mechanism and operatively connected to said main shaft and adapted to be operatively connected to said tool means when they are carried by said pantograph. Said tool means are adapted to be driven from said spindle through said drive means during an angular movement of said pantograph about said axis.