Patent ID: 6293738
Filing Date: 2001-09-25
Classification: B23B,Y10T

Abstract:
Thread cutting bit to cut thread in a material, said thread cutting bit comprising:a cover face;a bearing face;at least one cutting tip being configured and disposed to cut a thread in a material; andsaid cutting tip comprising:a first cutting edge and a second cutting edge being disposed at an angle to each other to cut a thread having a predetermined thread configuration and being configured to cut at both said first cutting edge and said second cutting edge simultaneously and further configured to form chips having a v-shaped cross section;a first cutting face and a second cutting face being disposed to permit said first cutting edge and said second cutting edge to cut a thread having said predetermined thread configuration;said first cutting face being disposed adjacent to said first cutting edge;said second cutting face being disposed adjacent to said second cutting edge;a projection being configured and disposed to project out and away from said cutting faces;said projection being configured to shape chips;said projection having a first side flank and a second side flank;each of said first side flank and said second side flank having a base portion;said base portion of said first side flank being disposed adjacent to said first cutting face;said base portion of said first side flank being disposed opposite said first cutting edge;said base portion of said second side flank being disposed adjacent to said second cutting face;said base portion of said second side flank being disposed opposite said second cutting edge;each of said first cutting face and said second cutting face having a width, each width being the distance between the corresponding base portion and corresponding cutting edge of each of said first cutting face and said second cutting face; andsaid width of said first cutting face being substantially greater than said width of said second cutting face in order to substantially minimize the chip length of the cut material.