The skiving process is multiple times faster than shaping and more flexible than broaching, due to the
continuous chip removal in skiving, but it presents a challenge to machines and tools. While the roll
motion between the cutting edge and the gear slots occurs with the spindle RPM, the relative axial cutting
motion is only about one third of the circumferential speed of the cutter. The cutting components of rolling
and cutting which result in a “spiral peeling” are represented with the process designation skiving.
Because of the relatively low dynamic stiffness in the gear trains of mechanical machines as well as the
fast wear of uncoated cutters, skiving of cylindrical gears never achieved a breakthrough against shaping
or hobbing until recently. The latest machine tools with direct drive train and stiff electronic gear boxes
present an optimal basis for the skiving process. Complex tool geometry and the latest coating
technology were required to give the soft skiving of cylindrical gears a breakthrough. Gleason has
developed a line of dedicated power skiving machines, which apply solid HSS cutters for small to medium
modules.

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