Patent ID: 7988389

Claim:
Twist drill, with an elongated drill body displaying a connecting end, a middle part, and a working end with a center point, and at least two main cutting edges that run roughly transversely to the longitudinal axis of the drill body and lie opposite one another in relation to the longitudinal axis, wherein said main cutting edges are each provided with a radially outer tip which projects in the feed direction of the twist drill, and a chip removal flute that follows on from each main cutting edge, spiraling about the longitudinal axis of the drill body over at least a section of the middle part, wherein the center point displays at least two pilot cutting edges, the pilot cutting edges start from the free end of the center point, and run roughly transversely to the longitudinal axis of the drill body and lie opposite one another in relation to the longitudinal axis, wherein a pilot chip removal flute follows on from each pilot cutting edge, said pilot chip removal flute transitioning into the chip removal flute, and the pilot cutting edges are each provided with a radially outer tip, wherein the main cutting edges extend radially inwards, under the circumferential radius on which the tips of the pilot cutting edges are located.