(under the class definition) Lathe specially adapted for removing material from an externally threaded fastener.
(1) Note. The lathes of this subclass are generally of the "engine-lathe" type having allowing the cutting of screws of various pitches.
SEE OR SEARCH CLASS
29, Metal Working,
27+, and 57 for combined machines, adapted for thread chasing.
408, Cutting by Use of Rotating Axially Moving Tool, for cutting of screw threads by a cutter that turns about an axis and moves along that axis toward a workpiece, with no additional motion, during operation.
409, Gear Cutting, Milling, or Planing, subclass for apparatus or processes for milling screw threads and helices.
470, Threaded, Headed Fastener, or Washer Making: Process and Apparatus, 80+, for lathe machines for screw threading except as provided for in Class 408.
