Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1997-07-11
1998-12-08
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Processes
Bit detachable
408227, 408230, B23B 3500
Patent
active
058460357
ABSTRACT:
A drill according to an exemplary embodiment of the invention comprises a shank from which the drill is driven; a body connected to the shank, the body having a surface; a flute in the body; a cutting edge at a drill point; and a peripheral relief surface which extends outwardly from the surface of the body to an outer circumference of the drill, wherein the peripheral relief surface, for a cross section of the drill perpendicular to a drill axis, intersects the outer circumference at a peripheral point at an edge of the flute. The drill has an improved capacity to withstand a loss of coolant during drilling without severe overheating of the drill or workpiece and with little damage to the drill and workpiece.
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Hayashi Steven Robert
Karafillis Apostolos Pavlos
Bhargava Adesh
General Electric Company
Howell Daniel W.
Johnson Noreen C.
Maddry Tyler
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