| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tool for sucking chips capable of improving the partibility of chips by a simple structure and improving the recovery efficiency of the chips. <P>SOLUTION: A cutting blade 9 formed at a tip 8a includes a plurality of stepped blades 9b formed with stepwise steps 9a from a tool axial center a toward the outside of the radial direction. Each of the stepped blades 9b is formed to form a tapered surface which becomes closer to the tool axial center a as the stepped blade is away from a tool tip a'. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
