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US 2006/0056929 A1Published application
Drilling tool for cutting cast materials
AssigneeJoerg Guehring
InventorPeter Haenle
Life of this patent
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Abstract
A drill for hard materials, comprising webs that are subdivided by means of cutting grooves, and at least one principal cutting edge, each of which is provided with a cutting corner and a transition to a chisel edge. At least some sections of the principal cutting edge are continuously convex in an axial direction starting from the cutting edge.
Claims25
A drill for hard materials comprising webs that are subdivided by means of cutting grooves and at least one principal cutting edge, each said principal cutting edge being provided with a cutting corner and a transition to a chisel edge,
- at least some sections of each principal cutting edge being continuously convex in an axial direction starting with each said cutting corner.
Dependencies are inferred from the claim text.