Patent ID: 7641001

Claim:
An improved boring tool having an axle with an outer surface to which a radially inwardly facing edge of a helical flight is attached, an outwardly facing edge of the flight forming a radial periphery of the flight, an axle shaft at a first axle end and a shaft-receiving bore at a second, opposite axle end, the improvement comprising: a nose removably mounted at the second axle end, the nose comprising a) a multiple-sided nose shaft extending into the shaft-receiving bore, said shaft-receiving bore having a complementary, multiple-sided sidewall for engaging the multiple sides of the nose shaft, thereby drivingly linking the nose to the axle; b) a cutting tip mounted to the nose shaft, the cutting tip having at least one blade; and c) a flight cutter having an aperture through which the nose shaft extends, thereby removably mounting the flight cutter to the nose shaft, the flight cutter having at least two blades with sharpened edges, wherein a length of the flight cutter is at least as great as a diameter of the radial periphery of the flight and a width of the flight cutter is substantially equal to a diameter of the axle.