| 摘要 |
A frustum cutting bit arrangement, comprising a shank portion (3) for mounting in, and to be retained by, a rotary cutting tool body, the shank portion (3) having an axis, an inner axial end, and an outer axial end. A head portion (5) has an axis coincident with the shank portion axis, a front axial end, and a rear axial end, the rear end coupled to the shank portion outer end, and the front end having a conical cavity (23) therein diminishing in diameter from the front end toward the rear end. |
