Cutting tool accessory
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 8, 1986
Issued Date -
N/A
app pub date -
Nov 7, 1983
filing date -
Sep 7, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A twist drill is provided with a countersink and collar assembly. The countersink includes a body with a face which cooperates with a similar face of the collar to trap a pair of balls between them. The faces being conical, enable the balls to be driven radially inward into the drill flutes by tightening the collar onto the countersink. A chip deflector is provided at the cutting edges of the countersink.
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