Tool holder and machine tool
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 25, 2014
Grant Date -
May 2, 2013
app pub date -
Dec 19, 2012
filing date -
Jan 24, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A tool holder includes: a shank portion gripped by a main shaft; a tool attachment portion having an insertion port into which a tool is inserted in a tip end surface thereof; a cover having a tubular wall that covers an outer periphery of the tool attachment portion and a bottom surface that covers the tip end surface of the tool attachment portion; a bearing provided between the tubular wall of the cover and the tool attachment portion; and a stopper that prevents the cover from co-rotating with the tool attachment portion. A through hole penetrated by the tool and an ejection port disposed on a periphery of the through hole in order to eject the coolant toward the tool are provided in the bottom surface of the cover.
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Cited Art Landscape
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