| 摘要 |
An assembly of a rotatable cutting tool and a tool holder is provided. The rotatable cutting tool includes a cutting tool body having a head portion at an axial forward end and a collar portion axially rearward of the head portion, and a shank portion axially rearward of the collar portion. Also included is a cap member positioned on the cutting tool body wherein the cap member has a base portion and a hard cutting tip affixed to the base portion. The tool holder includes a tool holder body containing a bore having a forward end and a rearward end. The rotatable cutting tool is rotatably retained in the bore of the tool holder body. In one aspect, the shank portion of the rotatable cutting tool is received in the bore of the tool holder body and means for lubricating the shank portion of the cutting tool body is provided. In another aspect, means for securing the cap member to the head portion is provided, for example magnetically securing the cap member to the head portion. In another aspect, means for preventing rotation of the cap member relative to the head portion is also provided.
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