| KENNAMETAL INDIA LIMITED Patent applications |
| Patent application number | Title | Published |
|---|
| 20130022423 | IDEXABLE DRILL INSERT - A quadrangular indexable drill insert includes: a top surface, a bottom surface, a side surface adjoining the top and bottom surfaces from four sides of the insert, four cutting edges configured at the intersection of the side surface and the top surface, and a screw hole disposed at the center of the insert. Each cutting edge includes: a first part edge; a second part edge extending from the first part edge; a third part edge extends away from a reference axis, a nose portion adjoins the first part edge with the third part edge of a succeeding cutting edge and a transitional edge joining the second and third part edges. The transitional part edge forms an angle of about 10° to about 90° with respect to the reference axis and forms a convex curve with the second part edge and a concave curve with the third part edge. | 01-24-2013 |
| 20130022422 | IDEXABLE DRILL INSERT - A quadrangular indexable drill insert includes a substantially flat top and bottom surfaces, a side surface adjoining the top and bottom surfaces, four identical cutting edges of the side surface intersecting the top surface, a through hole extending between the top and bottom surfaces, and a chamfer provided at the bottom edge of the drill insert. Each cutting edge includes a first part edge; a second part edge extending from the first part edge; a third part edge extending away from the central axis, the second and third part edges being joined together by a transition part edge having a concave curved portion and a convex curved portion; and a curved nose portion of predetermined radius disposed at a corner of the insert adjoining the first part edge of one cutting edge with the third part edge of a succeeding cutting edge of the four identical cutting edges. | 01-24-2013 |
