Fastening component

Abstract

A fastening component that is fastened to an arbor so as to fix a cutter, being a rotary cutting tool, to the arbor, the fastening component including: a shaft part screwed into an internal thread of the arbor; an engagement hole formed in a shaft center of an end surface that is opposite to an end surface that is fastened to the arbor; a first flow path formed in a shaft center of the shaft part and opened in an end surface of the shaft part which is fastened to the arbor; a third flow path opened, in a position that is away from the shaft center, in an end that is opposite to an end that is fastened to the arbor; and a second flow path connecting the first flow path and the third flow path.

Dependencies are inferred from the claim text.