| 摘要 |
PROBLEM TO BE SOLVED: To provide a drilling tool, feeding the optimum quantity of oil to the knife edge according to the stage of drilling work. SOLUTION: This invention relates to the drilling tool having a blade for drilling in a workpiece. The drilling tool 1 includes: a blade driving device 6 for driving the blade 2 in rotation; an oil feeder 10 having an electromagnetic pump 8 for feeding oil to the knife edge of the blade 2; and a control part 12 for controlling the blade driving device 6 and the oil feeder 10. The control part 12 causes the electromagnetic pump 8 manually operated with a first voltage while the blade is not rotated, and automatically operates the electromagnetic pump 8 with a second voltage lower than the first voltage interlocking with the blade driving device 6 when the blade 2 is rotated by the blade driving device 6. COPYRIGHT: (C)2006,JPO&NCIPI
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