Patents Assigned to MAPAL FABRIK FUR PRAZISIONSWERKZEUGE DR. KRESS DG
  • Publication number: 20120076597
    Abstract: The invention proposes a drill bit (1) leaving at least one main cutting edge (3, 3?) and at least one center cutting edge (15, 15?), wherein the drill bit (1) comprises a longitudinal axis (13), and wherein the at least one main cutting edge (3, 3?) and the at least one center cutting edge (15, 15?) are each assigned a rake face (7, 7?, 11, 11?). The drill bit (1) is characterized in that the rake face (11, 11?) assigned to the at least one center cutting edge (15, 15?) has at least two part faces (19, 19?; 21, 21?) which—as seen as perpendicular to the longitudinal axis (13) of the drill bit (1)—form an obtuse angle with one another, so that the at least one center cutting edge (15, 15?) comprises at least two part cutting edges (23, 23?; 25, 25?).
    Type: Application
    Filed: June 8, 2010
    Publication date: March 29, 2012
    Applicant: MAPAL FABRIK FUR PRAZISIONSWERKZEUGE DR. KRESS DG
    Inventors: Ulrich Krenzer, Peter Marz