For drilling a hole on a lathe, the drilling tool is placed in the ______.
tailstock
On a centre lathe the workpiece is held in the headstock and rotated, while cutting tools are brought to it from different fixtures depending on the operation. Understanding which fixture holds which tool is key here.
Why the tailstock is correct for drilling:
- The drill is mounted in the tailstock — either directly via its Morse-taper shank in the tailstock quill, or through a drill chuck fitted into the quill.
- The tailstock sits on the far end of the bed, aligned with the spindle axis, so the drill enters the rotating workpiece exactly on its centreline, producing a concentric (axial) hole.
- Feed is applied by turning the tailstock handwheel, which advances the quill and pushes the non-rotating drill into the spinning work.
Why the other options are wrong:
- The tool post holds turning, facing and boring tools mounted on the carriage; it is not used to feed a drill axially into the end of the work.
- The chuck (in the headstock) grips and rotates the workpiece, not the drill.
- The carriage carries the cross-slide and tool post for longitudinal/cross feed of turning tools, but the drill itself is not held there.
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Tool in the case of ultrasonic machining is made of _____.
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Top down manufacturing approaches are also known as _________ manufacturing.
