Importance

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Abstract

A design of a drill and a method for using the same are disclosed. A groove is formed on the outer periphery of an adapter which is connected to the electric motor. A fluid supply line is also formed on the adapter so as to lead fluid to the groove. Openings are provided at a proximal end of a shank, adjacent to the groove. Guide flutes extending from the openings to a tip of the shank are formed at an outer periphery of the shank so as to define passages for leading the fluid introduced from the openings to the tip of the shank to be sprayed upon the cutting debris. Exhaust ports for discharging the debris and exhaust passages for leading the debris through the shank to the exhaust ports are provided at the adapter. The guide flutes can be formed with milling machine or the like. When the drill is used, the drill is pressed against a material while being rotated. Then, the fluid is introduced into the passages between the shank and a sleeve and is sprayed upon the cutting debris. A suction is applied through a central portion of the shank to remove the cutting debris. The suction is strong enough to suck granular abrasives into the drilling area from outside the drill. The abrasive effect of the abrasives promotes self sharpening of the cutting teeth.

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First Claim