| 摘要 |
<p>A cutting tool is disclosed, particularly a ball track milling cutter, comprising a tool holder in which a turnover cutting disc is received that includes four cutting edges of circular arc segment shape. The cutting disc is received in a slot dividing the tool holder into two clamping jaws and is adapted to be clamped in position by a clamping screw which extends diametrically and passes through the cutting disc in the area of an opening. In addition to the clamping screw a thrust piece is provided to press the cutting disc with two cutting flanks axially against abutment faces at the bottom of the slot. The thrust piece is embodied by a nut extending through the cutting disc and adapted to be threaded into one of the clamping jaws, the nut having an outer conical portion located opposite the opening in the cutting disc throughout the height thereof and adapted to be engaged progressively in firm line contact with an inner surface area of the opening facing the slot bottom, as the nut is being screwed in, at the same time, pressing the turnover cutting disc against abutment faces of the tool holder while engaging the nut, the clamping screw tightens the clamping jaws against the turnover cutting disc.</p> |
