BORING TOOL

摘要

PROBLEM TO BE SOLVED: To provide a boring tool causing neither falling nor damage of a bit even in the case of forming a hole part in a machined material containing a hard material such as concrete. SOLUTION: This boring tool is constituted by fixing the bit 2 to the tip part of a shaft 1 and forms the hole part in the machined material with the bit 2 by rotating the shaft 1. The bit 2 is joined and fixed to the tip part of the shaft 1, and the bit 2 and the shaft 1 are connected through a heat transfer material 8 higher in heat conductivity than the shaft 1. COPYRIGHT: (C)2005,JPO&NCIPI