Abrasive cutting element and drill bit
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United States of America Patent
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Apr 28, 1998
Grant Date -
N/A
app pub date -
Mar 6, 1996
filing date -
Mar 6, 1996
priority date (Note) -
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Abstract
An abrasive cutting element comprised of an abrasive cutting layer and a metal substrate wherein the interface therebetween has a tangential chamfer, the plane of which forms an angle of about 5.degree. to about 85.degree. with the plane of the surface of the cylindrical part of the metal substrate. The abrasive cutting layer is preferably diamond or cubic boron nitride and the metal substrate is preferably tungsten carbide.
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