Patent ID: 8764353

Claim:
A reamer for machining a workpiece by chip removal, comprising: a holder, wherein the holder has a receiving opening disposed on a workpiece-side end face of the holder, wherein the receiving opening has an internal thread, wherein the holder has a holder bore extending inside the holder in a longitudinal direction thereof and opening into the receiving opening, and an exchangeable head, wherein the exchangeable head has (i) a cutting-nose element that comprises a plurality of cutting noses disposed in a distributed manner in a circumferential direction, (ii) an exchangeable-head shank that comprises an external thread corresponding to the internal thread disposed in the receiving opening of the holder, and (iii) a bearing contact element that is disposed between the cutting-nose element and the exchangeable-head shank, wherein the bearing contact element has a first bearing contact surface for bearing contact on a first support surface disposed on the workpiece-side end face of the holder, wherein the exchangeable-head shank and the bearing contact element are realized as a single piece, wherein an exchangeable-head bore corresponding to the holder bore extends through the exchangeable head in the longitudinal direction thereof such that the exchangeable-head bore extends through the exchangeable-head shank and the bearing contact element, wherein the exchangeable-head bore has a second internal thread, wherein the second internal thread is proximate a workpiece-side end of the exchangeable-head bore, wherein a tool engagement mechanism is provided in the exchangeable-head bore proximate the workpiece-side end of the exchangeable head bore, wherein the tool engagement mechanism, as viewed from a workpiece-side end face of the exchangeable head, is disposed at an end of the second internal thread provided in the exchangeable-head bore.