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------------------------------------------------ What are two reasons for center drilling on the lathe?

Center drilling on a lathe is primarily used to provide an accurate guide hole for the lathe center or drill to follow, ensuring precision and accuracy in the machining process. It also prevents drifting of the drill bit during precision drilling.

Explanation:

Center drilling on a lathe is a common manufacturing process used for two main purposes. First, center drilling is primarily used to provide an accurate guide hole for the lathe center or drill to follow. This guide hole ensures the alignment between the workpiece and the tool, resulting in high precision in the machining process. Second, it prevents the 'drift' of a drill bit when precision drilling is necessary, ensuring the lathe tool drills in the intended location and minimizing errors.

In other words, center drilling is crucial for both establishing the point of origin for subsequent drilling operations and ensuring the accuracy and precision of those operations. Without center drilling, features may not be placed accurately or in the correct alignment on the workpiece, leading to errors and imprecise work.

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