Grindstone tool
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United States of America Patent
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Sep 11, 2018
Grant Date -
Aug 20, 2015
app pub date -
Jun 14, 2013
filing date -
Aug 29, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A grindstone tool is provided with a shaft part which has a tubular shape having a connection hole therein, a head part which has a cylindrical shape coaxially and integrally connected to the leading end of the shaft part and having a hollow section therein, and abrasive grains which adhere to the entire outer peripheral surface of the head part via a bonding material. A grinding fluid is supplied to the hollow section of the head part from one end side of the head part, the other end side of the head part is blocked by a lid member, and in the head part, a plurality of communication holes through which the hollow section and the outer peripheral surface communicate with each other, and which each have a taper shape with a diameter size on the outer peripheral surface side larger than a diameter size of the shaft center side are formed.
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