DRILL Russian patent published in 1998 - IPC

Abstract RU 2105640 C1

FIELD: metal-cutting tools, applicable for improving the centering capacity. SUBSTANCE: the drill has a core with chip-deflecting flutes and a head with two or more cutting members, each of them has at least one cutting edge defining the chip- breaking and rear surfaces and having a rectilinear main part and a curvilinear part adjoining the transverse cutting edge. The point of tangency of the straight line passing through the drill axis and the curvilinear part is removed from the drill axis. EFFECT: improved centering capacity. 8 cl, 10 dwg

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RU 2 105 640 C1

Authors

Stefan Lindblom[Se]

Gustav Shedin[Se]

Dates

1998-02-27Published

1993-09-23Filed