Producing Screw Thread using a Centre Lathe

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  • Producing Screw Thread Using a Centre Lathe
    • Cutting tool set up on tool post
      • Used  to cut along the bar
        • Produces the correct thread profile on the bar
    • Cutting tool profile must match thread profile required
      • Metric thread
        • Must be 60 degrees
      • Other thread forms
        • Angles vary
    • Rate of rotation
      • In relation to longitudinal cut
        • Allows you to create correct thread pitch
        • Important with every cut tool comes in contact with the work at exactly same point
          • To cut the thread correctly
            • Lead screw used
              • Ensures by using gears
                • Rotation of chuck is directly related to the speed at which the tool moves along the work

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