ASYMMETRICAL BONE DRILL

摘要

A drill (10) for forming a hole in material has a shank (12) with at least a base surface (20) positioned at an angle to a longitudinal axis of the shank (12) and a side surface (21). A cutting element (18) having first and second ends (22, 24) is eccentrically connected to the base surface (20) in such a manner that a longitudinal axis (25) of the cutting element (18) is situated at a predetermined distance from a longitudinal axis (15) of the shank (12). An outer surface of the body of the cutting element (18) is defined by at least a front surface (28), and a rear surface (26) intersecting each other along at least a cutting edge (30). The rear surface (26) is tapered toward the longitudinal axis (15) of the shank (12) so that only the cutting edge (30) and the drill point (27) engage the material and a substantial open area exists between the outer surface of the cutting element (18) and the hole during the entire process of drilling.