Cutting tap and method of making same

A cutting tap comprising a body having an axial forward end and an axial rearward end and a central longitudinal axis, the body having a fluted section at the axial forward end, the fluted section including a chamfered fluted section extending from the axial forward end of the body and terminating at a first full cutting thread, the chamfered fluted section comprising a first cutting thread located a first distance from the axial forward end of the body and a second cutting thread located a second distance from the axial forward end of the body, the second distance being greater than the first distance, wherein a peripheral surface of the chamfered fluted section is non-linear such that a thickness of a section of material removed by the second cutting thread is smaller than a thickness of a section of material removed by the first cutting thread.

A cutting tap comprising a body having an axial forward end and an axial rearward end and a central longitudinal axis, the body having a fluted section at the axial forward end, the fluted section including a chamfered fluted section extending from the axial forward end of the body and terminating at a first full cutting thread, the chamfered fluted section comprising a first cutting thread located a first distance from the axial forward end of the body and a second cutting thread located a second distance from the axial forward end of the body, the second distance being greater than the first distance, wherein the first cutting thread forms a first chamfer angle with respect to the central longitudinal axis, and wherein the second cutting thread forms a second chamfer angle with respect to the central longitudinal axis, the second chamfer angle being smaller than the first chamfer angle,

• wherein the chamfered fluted section comprises at least three cutting threads, and wherein a thickness of a section of material removed from successive cutting threads become progressively smaller as a function of distance from the axial forward end of the body.

A cutting tap comprising a body having an axial forward end and an axial rearward end and a central longitudinal axis, the body having a fluted section at the axial forward end, the fluted section including a chamfered fluted section extending from the axial forward end of the body and terminating at a first full cutting thread, the chamfered fluted section comprising a first cutting thread located a first distance from the axial forward end of the body and a second cutting thread located a second distance from the axial forward end of the body, the second distance being greater than the first distance, wherein the first cutting thread forms a first chamfer angle with respect to the central longitudinal axis, and wherein the second cutting thread forms a second chamfer angle with respect to the central longitudinal axis, the second chamfer angle being smaller than the first chamfer angle,

• wherein each of the first and second cutting threads have a cutting face terminating at a distal cutting edge, and the cutting face being defined by a transition radius having a center point, wherein the center point of the first cutting thread located at a first distance from the distal cutting edge, and wherein the center point of the second cutting thread located at a second distance from the distal cutting edge, and wherein the second distance being greater than the first distance.