FIELD: soil or rock drilling; mining.
SUBSTANCE: invention relates to mining industry, and more specifically to cutters intended for boring bore pits in rock massifs. Drill bit includes housing with two pens and two hard-alloy inserts on them. Hard alloy inserts in the axial plane of the cutter are made in the form of an elliptical Cassini oval. Blades of inserts are formed along large axes of Cassini oval, and larger axes of ovals themselves are inclined to axis of cutter at acute angle.
EFFECT: technical result of claimed invention is in increased resource of drilling cutter operation.
1 cl, 1 dwg
| Title | Year | Author | Number |
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