A 1/4 -in drill rod was heat-treated and ground. The measured hardness was found to be 490

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A 1/4 -in drill rod was heat-treated and ground. The measured hardness was found to be 490 Brinell. Estimate the endurance strength if the rod is used in rotating bending.

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Shigleys Mechanical Engineering Design

ISBN: 978-1121345317

9th edition

Authors: Richard G. Budynas, J. Keith Nisbett

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Question Posted: Oct 10, 2009 04:20 AM

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A 1/4 -in drill rod was heat-treated and ground. The measured hardness was found to be 490

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