| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fluid feeding unit capable of removing chips adherent to a drill by feeding fluid. Ž<P>SOLUTION: The fluid feeding unit is provided with a nozzle 2 having a flow passage 7 for cutting oil for jetting the cutting oil toward a tip part 31a of the drill 31 for drilling a workpiece. The nozzle 2 is provided with a tool hole 4 for inserting the drill 31 and circumferentially provided with the flow passage 7. The flow passage 7 has a jetting port 10 around the tool hole 4, and is inclined to a radially inner side while extending toward the jetting port 10. The flow passage 7 is provided with a plurality of grooves 6, whose longitudinal direction is a direction toward the jetting port 10, in a circumferential direction. The grooves 6 have a circular cross section. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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