Throw-away burnishing tool for outside diameter and for inside diameter

A throw-away burnishing tool for an inside diameter comprising:

• a cylindrical shank to be mounted on a processing machine;
• a tip holder received in the shank and rotatable around a rotating shaft by a workpiece pressing force;
• an attachment seat provided at a front-end portion of the tip holder;
• a throw-away type hard material tip detachably attached to the attachment seat;
• a pusher accommodated in the shank and having an end surface;
• an urging means provided at the end surface of the pusher and urging the pusher toward the tip holder in an axial direction of the shank;
• an urging force adjustment means for adjusting an urging force generated by the urging means;
• an urging force conversion means for transmitting the urging force to an enlarged diameter shaft of the tip holder such that a direction of the urging force is converted to a rotating direction of the enlarged diameter shaft,
• wherein a pressing force is imparted to a workpiece by a rotation of the tip holder in the rotation direction that is caused by the urging force.