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What is not true about Gang milling

  • A.Two or more cutters are used to perform operation
  • B.Cutters have the same or different diameter
  • C.Each cutter is mounted on arbor of the milling machine
  • D.None of the above

Answer: D

The answer is None of the above, because all three statements are true.

Gang milling uses two or more cutters mounted together on the same arbor of a horizontal milling machine, so that several surfaces are machined in one pass. The cutters may be of the same or different diameters and widths, depending on the profile and the heights of the surfaces to be cut, and each cutter is mounted on the arbor.

Since none of the first three statements is false, none of them can be 'not true', which leaves 'None of the above'. Straddle milling is the special case of two side-and-face cutters spaced apart to machine two parallel faces at once.

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