Reamer

A reamer with a workpiece-side axial end and a drive-side axial end, said reamer comprising:

• a shank made of steel for mounting in a drive shaft;
• circumferentially spaced-apart cutting ribs;
• and
• a cutting body produced as a separate part from the shank and made of a harder material than the shank;
• wherein the cutting body forms the workpiece-side end of the reamer over an entire outer circumference of the workpiece-side end, and is fastened to the shank via soldering at a single contact face between the cutting body and the shank;
• the cutting ribs being integrally formed with respect to the cutting body, wherein all the cutting ribs are formed only on the cutting body;
• the cutting body comprising chip grooves, wherein each chip groove is disposed adjacent to and between two of the cutting ribs;
• the shank comprising chip groove run outs recessed into an outer circumference of the shank;
• the chip grooves on the cutting body merging directly into the chip groove run outs on the outer circumference of the shank;
• the cutting body comprising a region with the largest outside diameter of the reamer, and having a larger outside diameter than the shank;
• the shank comprising:
• a first, larger-diameter section adjacent to and adjoining the cutting body;
• a second, smaller-diameter section for being mounted in the drive shaft, the second section extending axially away from the first section;
• and
• a shoulder where the first section adjoins the second section, the shoulder resulting from different diameters between the first and second sections;
• the first section of the shank comprising:
• a first, larger-diameter sub-section adjacent to and adjoining the cutting body;
• and
• a second, smaller-diameter sub-section extending axially away from the first sub-section to the shoulder;
• wherein the chip groove run outs extend through the first sub-section and open out in the second sub-section.