Abstract: The invention relates to a machine tool for machining a work piece having a main spindle unit with a preferably vertical spindle axis, and a machining spindle unit, particularly a hobbing spindle unit that is arranged next to the spindle axis in a direction crosswise to the spindle axis to accommodate a machining tool, with said machining spindle unit being displaceable along a first guiding direction, in particular vertically (z) by means of a first guide and crosswise, preferably perpendicularly (x) or approximately perpendicularly displaceable to the first guiding direction, particularly the vertical, by means of a second guide, can advance to a work piece clamped in the main spindle unit, and can swivel around a swivel axis (B), preferably perpendicularly to the spindle axis (A) of the machining spindle unit, and with the machining tool having an arbitrary number of helically arranged machining elements, in particular a single- or multi threaded generating means, adapted to execute generating teeth manufa

Abstract: An apparatus for forming a saw blade or saw band by forming saw teeth in a solid stock moving continuously in a longitudinal direction includes a grinding wheel mounted for rotation about an axis which is inclined at an acute angle to and which diverges from the direction of movement of the stock. The grinding wheel has a generally frusto-conical configuration and an outer periphery defined by first and second axially distinct helical grinding ribs having different contours.

Abstract: A method and apparatus for generating a shape on the periphery of a non-rotating workpiece by orbiting a rotating cutter in cutting engagement with the workpiece. Either the cutter or the workpiece is moved linearly in the lengthwise direction of the workpiece.

Abstract: In a machine of the type in which cutting tools are arranged on successive links of an endless chain, each tool being in offset rotation to the preceding tool, at right angles to the direction of travel, means are provided for periodically shifting the workhead and work spindle parallel with the plane in which the tools travel when cutting. The means for shifting are operatively independent of the means for driving the chain and the work spindle in generation, and are operated when the tools and workpieces are disengaged, and normally after a predetermined number of stacks of workpieces has been cut, in order to equalize wear on the blades carried by the chain.