Method of Drilling Hole and Coolant Used In Hole Drilling Work
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United States of America Patent
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Jul 26, 2017
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Jul 27, 2016
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Abstract
Provided is a method of drilling a hole in a drilling object by using a hole drilling device 1 including: a drill bit 3 including a cutting edge on a distal end thereof; and an electric drill 2, which rotates the drill bit 3, the method including a cutting step of rotating the drill bit 3 to drill a hole in the drilling object in a state where a water-soluble gel coolant is applied to the distal end of the drill bit 3.
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