Reamer

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

• a shank for mounting in a drive shaft;
• and
• a cutting body produced as a separate part from the shank and made of a different material than the shank;
• wherein the cutting body:
• is fastened to the shank;
• forms the workpiece-side end of the reamer over an entire outer circumference of the workpiece-side end;
• comprises cutting ribs which are spaced-apart circumferentially;
• and
• comprises chip grooves disposed between the cutting ribs;
• the shank comprising:
• a first, larger-diameter section adjacent to and adjoining the cutting body;
• a second, smaller-diameter section extending axially away from the first section;
• chip groove run outs which are recessed into an outer circumference of the shank and terminate within 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 chip grooves on the cutting body merging directly into the chip groove run outs on the outer circumference of the shank;
• 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;
• wherein the chip groove run outs extend through the first sub-section and open out in the second sub-section.