Single cut reamer with chip guiding device

A single-blade reamer for cutting in a cutting direction, the reamer comprising a base body having an outer circumference, a cutter plate attached to the base body for performing a cutting action when the base body is rotated in the cutting direction, a first guide strip attached to the base body, a second guide strip attached to the base body and disposed approximately opposite the cutter plate, wherein the first guide strip is disposed spaced from the cutter plate in a direction opposite the cutting direction and between the cutter plate and the second guide strip, a chip-guide device disposed angularly between the first guide strip and the second guide strip, the chip-guide device being a valley defined in the base body, the valley having a first zone and a second zone, the first zone gradually beginning at the outer circumference of the base body and sloping radially inwardly from the outer circumference of the base body in a direction opposite the cutting direction, and the second zone steeply sloping radially outwardly to the outer circumference of the base body, and wherein the chip-guide device extends in axial direction of the base body at least over the length of the guide strips.