Patent Number: 6,250,857

Title: Drill

Abstract: A drill having a drill head with a drill shank extending between the drill head and a plug-in end lying opposite the drill head, said drill shank having a conveying helix formed by at least two helical flutes and webs located between the flutes. The flutes comprise the same clear cross section at least in the region of the end of the drill shank adjacent the drill head and are arranged at an angle a in a range of through relative to one another.

Inventors: Kersten; Heinrich (Verden, DE)

Assignee: Gebruder Heller Drinklage GmbH

International Classification: B23B 51/02 (20060101); B23B 051/02 ()

Expiration Date: 06/26/2018