Drill
AssigneeRobert Bosch GmbH
InventorsMartina Spahni, Immo Juergens, Rafael Staehli, Milan Bozic
Life of this patent
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Abstract
A drill, in particular for drilling metal, includes a cutting part which has a drill point and at least two helical grooves which extend from the drill point to an end of the cutting part opposite the drill point, and in the region of the drill point, each lead into a thinned region. The thinned regions form a cross-grinding. The thinned regions each have an opening angle of less than 30°.
Claims16
A drill including a cutting part which has a drill point and at least two helical grooves which extend from the drill point to an end of the cutting part opposite the drill point, and in the region of the drill point, each lead into a thinned region, wherein the thinned regions form a cross-grinding, and wherein the thinned regions each have an opening angle of less than 30°.
Dependencies are inferred from the claim text.