Q.10 In a drilling operation under, a given condition, the tool life found to decrease from 20mint to 5 mint due to increase in drilling speed from 200 rpm to 400 rpm. What will be thetool life of that drill under the same condition if the drill speed is 300 rpm.

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Answered: increase in drilling spee

Engineering

Mechanical Engineering

increase in drilling spee

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter4: Drill Press

Section4.1: Introduction To The Drill Press

Problem 3RQ: Explain how the size of an upright drill press is determined.

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Q.10 In a drilling operation under, a given condition, the tool life found to decrease from 20
mint to 5 mint due to increase in drilling speed from 200 rpm to 400 rpm. What will be the
tool life of that drill under the same condition if the drill speed is 300 rpm.

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