The part of the drill by which it is held and driven. The angle included between the cutting lips projected upon a plane parallel to the drill axis and parallel to the two cutting lips. The cutting end of the drill made up of the end of the lands and the web inform it resembles a cone, but departs from a true cone to furnish clearance behind the cutting lips. The length from the extreme end of the shank to the outer corners of the cutting lips it does not include the conical shank end often used on a straight shank drill, nor does it include the conical cutting point used on both straight and taper shank drills. The section of reduced diameter between the body and the shank of a drill. The cylindrical portion of the land which is not cut away to provide clearance. The axial relief angle at the outer corner of the lip it is measured by projection onto a plane tangent to the Periphery at the outer corner of the lip. The cutting edge of a two-flute drill extending from the chisel edge to the periphery. The axial advance of the leading edge of the land in one turn around the circumference.
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