Insert-type drill and insert therefor

Details Insert-type drill and insert therefor Insert-type drill and insert therefor

B - Operations, Transporting

23

B

77/33

B23B 51/00 (2006.01) B23B 27/00 (2006.01) B23B 27/10 (2006.01) B23B 27/16 (2006.01)

Patent

CA 1070147

INSERT TYPE DRILL AND INSERT THEREFOR Abstract of the Disclosure: A single flute drill having a single, replaceable cutting insert which can drill from the solid, as well as being used for other single point machining operatings such as turning, internal and external diameter boring, contouring and facing. The insert is configured and related to the drill body so as to provide a single, radially extending cutting edge which has an effective neutral rake and negative lead. A specific insert structure is also pro- vided for use in the drill. The disclosed insert comprises a solid body having parallel upper and lower faces each generally in the shape of an equilateral parallelogram and joined along their peripheral edges by side walls. One cutting edge is formed along the juncture of one side wall and the upper face and is inclined along its length toward the lower face. A second cutting edge is formed along the juncture of the lower face and a second side wall which intersects the first side wall at a corner. The second cutting edge is inclined along its length from the corner of the intersection toward the upper face.

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