Patent ID: 8485767

Claim:
A cutter-tooling assembly comprising: a cylindrical tool holder having a connecting section having an outer surface and an end surface; a flange section formed on the outer surface of the connecting section; an inserted section mounted securely with the end surface of the connecting section; and a through hole axially formed through the connecting section and the inserted section and having a fixing segment being hexagonal in a cross sectional shape, located at the inserted section and having an inner surface; and six recesses formed around the inner surface of the fixing segment at intervals; and a cutter inserted into the through hole of the tool holder and having a cutting end; a fixing end opposite to the cutting end of the cutter, said fixing end being triangular in a cross sectional shape and having a maximal diameter; an outer surface; and three corners which are formed on the outer surface of the fixing end and abut three of the recesses; and a central segment formed between the cutting end and the fixing end of the cutter and having a diameter being larger than or equal to the maximal diameter of the fixing end.