| 摘要 |
<p>The purpose of the present invention is to provide an insert capable of dispersing a load applied thereto when a cutting or a groove machining processes, and is capable of preventing from being separated from a tool holder beforehand. According to the present invention for the above purpose, an insert comprises: a cutting part cutting a workpiece; and a holder fastening part fastened to a tool holder, wherein the holder fastening part includes a holder fastening surface to be fastened to the tool holder, and at least one holder connector formed on the holder fastening surface having a width gradually become smaller or larger from the cutting part when moving backwards.</p> |
