Boring tool, particularly a reamer

A boring tool, comprising:

• a clamping shank;
• and
• a boring body, said boring body having at least one main blade which extends between an end face of the boring body and the clamping shank along a longitudinal axis of the boring body, said at least one main blade having a blade web, said blade web having a rake face facing toward a groove-shaped chip space of the boring body and a free surface arranged on an outer circumference of the boring body, said rake face and said free surface converging at a cutting edge of the at least one main blade, said cutting edge extending along the longitudinal axis of the boring body,
• said main blade transitioning at the end face of the boring body into a groove blade having a groove-chip rake face, said groove blade oriented transverse to the longitudinal axis of the boring body,
• said groove blade being configured to form a groove in an inner wall of a predrilled core bore of a workpiece during a movement of the boring tool into the pre-drilled core bore along a longitudinal axis of the core bore, said groove extending along the longitudinal axis of the core bore,
• said main blade being configured to engage in said groove and to cause a material removal on the inner wall of the pre-drilled core bore of the work-piece as a result of a rotation of the boring tool,
• wherein the groove blade has a groove-base cutting edge which at a first blade corner of the main blade converges with the main cutting edge of the main blade,
• wherein the free surface of the blade web and the groove-chip rake face converge at the groove-base cutting edge,
• wherein the groove-chip rake face is delimited by the groove-base cutting edge and by a first and a second groove-flank cutting edge of the groove blade, each said first and second groove-flank cutting edge transitioning at the first blade corner and at a second blade corner of the main blade into the groove-base cutting edge.