Clamping Apparatus For Cutting Insert

A cutting tool comprising:

• a tool holder comprising a cutting insert pocket and a mounting bore exposed through a portion of the pocket;
• a cutting insert having a through-hole and secured in the cutting insert pocket by a clamp lever and a fixing screw, wherein:
• the clamp lever comprises a clamp portion inserted through the through-hole of the cutting insert and a lever portion placed in the mounting bore;
• the fixing screw exerts pressure on the lever portion of the clamp lever to secure the cutting insert on the tool holder, the fixing screw being fastened through a hole which extends downwardly from a side surface of the tool holder to the mounting bore,
• one end of the fixing screw is provided with a pressure-applying surface substantially perpendicular to the rotational axis of the fixing screw, and
• the side surface of the lever portion of the clamp lever is provided with an inclined surface which makes contact with the pressure-applying surface of the fixing screw.