(under subclass 65) Apparatus including a first cutting tool for formation of a recess extending about and spirally along a rodlike or tubelike workpiece with relative positioning of the workpiece between cutting passes and including a second cutting tool for formation of a recess extending about and spirally along a rodlike or tubelike workpiece by making several cutting passes through that workpiece with relative positioning of the workpiece between cutting passes; or, including a first means for grippingly engaging a first workpiece to present that workpiece to a cutter and including a second means for grippingly engaging a second workpiece to present that workpiece to a cutter.
(1) Note. The first and second cutting tool may act on the same or different workpieces; the first and second gripping means may present the workpiece to the same or different cutting tools.
(2) Note. Included in this subclass is a thread milling machine having a tool turret or a blank turret.
SEE OR SEARCH THIS CLASS, SUBCLASS:
71, for a machine including a thread or helix generating milling cutter combined with a nonthread of nonhelix generating milling cutter.
SEE OR SEARCH CLASS
29, Metal Working, 33+, for a machine which can perform diverse operations, frequently by utilizing a plurality of cutters or blank holders.
