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Low helix angle drills are preferred for drilling holes in

This question belongs to Mechanical Engineering Manufacturing And Production Technology
Manufacturing and Production Technology
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Low helix angle drills are preferred for drilling holes in

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Correct Answer: Option A
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2 Comments
Ritesh Toppo
Ritesh Toppo 7 years ago
It's not option A....low helix angle drill preferred for harder materials
Abhi Londhe
Abhi Londhe 7 years ago
low helix angle is used for hard material but plastic is soft material as compair to other mentioned option so how it required low helix angle drill bit
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