Cold headed center vacuum drill bit
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United States of America Patent
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-
Sep 26, 1995
Issued Date -
N/A
app pub date -
Feb 25, 1994
filing date -
Dec 19, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
A drill bit for drilling holes in a work surface including a hard wear-resistant insert and a metal body including a top working surface of an irregular surface configuration having a slot for retaining the hard wear-resistant insert. The body having a metal grain structure substantially parallel with the contour of the body. In a preferred embodiment the body is formed by cold-heading.
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