| 摘要 |
A holder or nest 30 for pin-type replaceable cutting inserts 15 having a circular aperture 16 centrally disposed therein, includes a pin 50 extending perpendicularly to the face of the holder, the pin being formed with a pair of opposed axially- extending portions 50, each of which comprise a segment of a circular cylinder having a periphery less than 180 DEG . The radius 52 of each of the portions is selected equal to the radius of the aperture 16 in the cutting inserts 15. The portions meet in a plane 53 normal to the face of the tool holder and disposed perpendicularly to the axis of the clamping screw 40 which is threadedly receivable in the body of the holder. By this means the clamping force exerted by the screws 40, forces the insert 15 to seat itself, on the lateral surface 33 of the one axially extending portion of the pin which is inwardly disposed in the cutter body, thereby to achieve positive seating of the insert on the pin in a direction perpendicular to the pin and parallel to the plane between the axially extending portions thereof. <IMAGE> |
