Answer :
Final answer:
When the hole length exceeds the capacity of a lathe, the drilling must be performed with a special deep-hole drilling machine, which is designed for drilling holes significantly longer than their diameter. So, the correct answer is D) Deep-hole.
Explanation:
If the hole length in a workpiece exceeds the capacity of the lathe, the drilling must be done using a special deep-hole drilling machine.
Deep-hole drilling is a specialized process that allows for the creation of holes that are significantly greater than the diameter in a piece of material.
While the standard lathe, for instance, may be used for a range of standard hole depths, when the hole length exceeds its capacity, a specialized machine is needed.
It's also worth noting that a deep-hole drilling machine implements special procedures like high-pressure coolant to ensure both accuracy and efficiency in the drilling process.
So, the correct answer is D) Deep-hole.
Learn more about Deep-hole drilling here:
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