Indexable Drill and Drill Body
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United States of America Patent
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app pub date -
Nov 18, 2011
filing date -
May 29, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A drill body of an indexable drill includes: a chip discharging groove which discharges chips produced by a cutting insert on a wall surface defining the chip discharging groove; and an insert attachment seat on which the cutting insert formed in a front end side, in a rotational axis direction, of a first wall surface of the chip discharging groove that faces a drill rotation direction is detachably mounted. A chip formation portion is formed which includes at least any of a plurality of protruding portions that protrudes outward from a second wall surface and a plurality of concave portions that is concave inward from the second wall surface, at least in a front end portion of the second wall surface of the chip discharging groove that faces a rear side of the drill rotation direction.
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