Trepanning drill
The utility model discloses a trepanning drill comprising a cutting part, a guide part and a tail part, wherein the head of the cutting part is a drill bit; the periphery of the cutting part is provided with an iron scrap removing groove extending to the guide part; the center of a drill body formed...
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Main Authors | , , , , |
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Format | Patent |
Language | Chinese English |
Published |
12.05.2010
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Subjects | |
Online Access | Get full text |
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Summary: | The utility model discloses a trepanning drill comprising a cutting part, a guide part and a tail part, wherein the head of the cutting part is a drill bit; the periphery of the cutting part is provided with an iron scrap removing groove extending to the guide part; the center of a drill body formed by the cutting part, the guide part and the tail part is provided with inner holes communicated with each other; the inner holes and the excircle of the drill body are respectively conical; and the outer diameter of the drill body is 30mm. The coaxality of the cutting part, the guide part and the tail part is not more than 0.02mm. The trepanning drill is used for processing holes with the diameter of 30mm or metal sampling, can prevent the radial fracture of the trepanning drill caused by collision of a core rod with the walls of the inner hole when in trepanning, and has simple structure, strong implementability, convenient removal of iron scrap and high production efficiency. |
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Bibliography: | Application Number: CN2009274077U |