A method for manufacturing a sidewall support surface of an insert-receiving pocket with a compound radius includes the steps of: 1) tilting a cutting tool at a primary tilt angle with respect to a first plane (x-z); 2) tilting the cutting tool at a secondary tilt angle with respect to a second plane (y-z), the second plane different than the first plane; and 3) rotating the cutting tool about an axis (z-axis) perpendicular to a pocket floor of the insert-receiving pocket while maintaining the first and second tilt angles. A cutting tool including a toolholder with the insert-receiving pocket having a pocket floor and the sidewall support surface formed with a compound radius is also described.

Provided are a fixing member and a cutting tool capable of pressing and fixing a cutting insert to a tool body in a stable state without defects such as wear and deformation.

A fixing member pressing and fixing a cutting insert disposed on an insert mounting part of a tool body includes a fixing member body configured to be fastened to a fixing member mounting part of the tool body and a pressing portion that is provided to the fixing member body and configured to press the cutting insert when the fixing member body is fastened to the tool body, wherein in the pressing portion, a bulging portion having an outer shape, in which a cross-sectional view in a direction orthogonal to a width direction of the fixing member body is curved in an arc shape, is formed along the width direction of the fixing member body.

Provided is a drill insert to ensure sufficient chipping resistance with respect to a large cutting load, which is detachably attached to a distal portion of a drill body which is rotated around an axis, in which a polygon face of a polygonal plate-shaped insert body is a rake face, a side face disposed around the rake face is a flank face, a cutting blade is formed on a ridge portion in which the rake face and the flank face intersect each other, the cutting blade includes a honing face, the honing face includes a first convex curved face continuous with the rake face and a second convex curved face continuous with the flank face, and in a cross section orthogonal to the cutting blade, a curvature radius of the first convex curved face is larger than a curvature radius of the second convex curved face.