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Drill with zero rake: identify the tool type A drill that effectively has zero rake angle (scraping action) is termed what? Choose the correct name.

Q: Drill with zero rake: identify the tool type A drill that effectively has zero rake angle (scraping action) is termed what? Choose the correct name.

Concept/Approach A flat (spade-type) drill removes material primarily by a scraping/zero-rake action, unlike twist drills which have positive rake cutting lips and helical flutes for chip evacuation. Final Answer Flat drill

Difficulty: Easy

Flat drill
Straight fluted drill
Parallel shank twist drill
Tapered shank twist drill

Correct Answer: Flat drill

Explanation:

Concept/Approach
A flat (spade-type) drill removes material primarily by a scraping/zero-rake action, unlike twist drills which have positive rake cutting lips and helical flutes for chip evacuation.

Final Answer
Flat drill

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