Gun drill coolant bushing and method of making same
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United States of America Patent
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-
Jun 27, 1989
Issued Date -
N/A
app pub date -
Jun 6, 1988
filing date -
Aug 11, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lock collar for a drill bushing and a system for cooling a drill bit during a drilling operation are arranged so as to be incorporated into a single mechanism. The mechanism involves two assemblies, one being a locking liner embedded in a jig plate, and the other being a coolant directing assembly adapted to be mounted on a power-fed tool. There is coolant passage means in the coolant directing assembly which accepts coolant from an appropriate source and directs it through the first mentioned assembly to the cutting edge of the drill bit or other cutting tool while the cutting operation is taking place. By reverse rotation of the coolant directing assembly, that assembly can then be removed for subsequent engagement with another locking liner. Various structures and methods of manufacture are employed for forming the coolant passage means.
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