Drill
1 Assignment
0 Petitions
Accused Products
Abstract
A drill bit has a tool shank, a center axis, a first cutting region with at least one geometrically defined first cutting edge, the same having a cutting face arranged at a radial distance from the center axis of the drill bit. The first cutting edge forms a countersink angle with the center axis. The drill bit having a chip shaping stage functionally assigned to the first cutting edge formed by the cutting face of the first cutting edge and by a shoulder surface adjoining the cutting face and forming a shoulder angle with the same, wherein the shoulder angle is greater than 90°, and preferably greater than 100°. The cutting face runs at a radial rake angle with respect to an imaginary radial line which cuts the first cutting edge, the same functionally assigned to the cutting face. The radial rake angle is positive.
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Citations
29 Claims
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1-13. -13. (canceled)
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14. A drill bit comprising:
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a tool shank; a center axis; a first cutting region with at least one geometrically defined first cutting edge having a cutting face arranged at a radial distance from the center axis of the drill bit, the first cutting edge forming a countersink angle with the center axis; and a chip shaping stage is functionally assigned to the first cutting edge, the chip shaping stage formed by the cutting face of the first cutting edge and by a shoulder surface adjoining the cutting face and forming a shoulder angle with the same, the shoulder angle being greater than 90°
, whereinthe cutting face runs at a radial rake angle with respect to an imaginary radial line which cuts the first cutting edge, the same functionally assigned to the cutting face, the radial rake angle being positive. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29)
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Specification