Peter/Royce:
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Are we talking about thread milling here?
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When thread milling the work-piece is clamped to the milling table and the X-Y motion of milling table can make any point on the work-piece follow a circular path.? The cutter in the spindle can then be used to mill an internal or external thread on the work-piece at that point.? The link that was provided looks an awful lot like what a thread milling cutter looks like.
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With thread milling you do not need to coordinate spindle rotation and axis movement like you do when cutting threads on a lathe.
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Don
