Patent ID: 8727679

Claim:
A boring bit comprising: a shank including a first end and a second end, the shank defining a longitudinal axis extending through the first end and the second end; and a drilling head coupled to the first end of the shank coaxial with the longitudinal axis, the drilling head including a center tip extending axially along the longitudinal axis, and a pair of flanges extending radially outward from the center tip, each flange including a cylindrical sidewall section, a cutting edge extending radially outward from the center tip to the cylindrical sidewall section, a bottom face extending radially outward from the first end of the shank to the cylindrical sidewall section, a rake face extending axially from the cutting edge to the bottom face, a rearward edge extending radially outward from the first end of the shank to the cylindrical sidewall section and defining a boundary of the bottom face opposite the rake face, a spur spaced from the longitudinal axis and extending axially from the cylindrical sidewall section, and a chip channel defined at least in part by the cylindrical sidewall section to direct cut material away from the cutting edge and toward the shank; wherein the cylindrical sidewall section of each flange extends through a sweep angle from the cutting edge to the rearward edge, the sweep angle being between about 30 degrees and about 60 degrees, wherein each flange further includes a trailing edge spaced from the cutting edge and extending radially outward from the center tip, a cutting face extending between the cutting edge and the trailing edge, and a relief face extending circumferentially away from the cutting face along the cylindrical sidewall section, and wherein each flange further includes a floor section forming the bottom face and a trailing face extending axially from the trailing edge to the floor section, and wherein the chip channel of each flange is defined by the trailing face, the cylindrical sidewall section, and the floor section.