| 摘要 |
PROBLEM TO BE SOLVED: To provide a diamond core drill that allows diamond to be maximally used without waste. SOLUTION: The diamond core drill (A) is provided with a blade part 1, in which diamond grains are scattered on its tip part, and an attachment/detachment means 7, which is mounted to a drilling device side, at a base body part 2 provided to the base end side of the blade part 1. The base body part 2 is provided with a ring member mounting part 6 for allowing a replacement ring member 3 in a ring shape as a whole, which has diamond grains mounted on its outer peripheral face and is freely attachable/detachable to the blade part, to be freely attachably/detachably mounted on it. The attachment/detachment means 7 is formed to the base end side of the ring member mounting part 6. COPYRIGHT: (C)2007,JPO&INPIT
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