Discussion
In facing process, length of tool travel is which of the following?
Answer: B
In facing, the length of tool travel is the radius of the workpiece.
Facing machines the end of the work. The tool is fed across the face at right angles to the axis, from the outside diameter to the centre (or from the centre outward), so it travels a distance equal to the radius, plus a small approach and overrun.
The length of the workpiece is the travel in turning, not facing. The tool does not cross the full diameter, since once it reaches the centre the whole face has been cut, and the travel cannot be all three at once.
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