1. Cutting key ways on shafts
  2. Cutting external screw threads
  3. Cutting teeth of spur gears
  4. All of these

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Answer: Option 4

In this operation, surfaces which are at an angle to the axis of the cutter, is machined by the rotary cutter. -Milling machine can perform all other common operations like turning, facing, fillet making, chamfering, drilling, gear cutting, planning, slot cutting.

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