| 摘要 |
<p>A slot-widening key for use with insert holders of the kind that includes a blade shaped body having a slot intended to receive an insert. One surface of the slot is defined by an elastically flexible clamping arm for clamping the insert. The key has a shaft with two projections for engaging laterally opening seats in the body and the clamping arm, respectively. One of these two projections is provided on a pivoting link that is pivotably connected with the shaft via a hinge pin. The sum of a first distance between the hinge pin and one of projections, plus a second distance between the hinge pin and the other projection, is larger than the at-rest distance between the seats of the insert holder. Pivoting of the shaft beyond an unstable position of equilibrium thus makes the clamping arm deflect by a predetermined value for widening the slot. The key is self-supporting in the slot-widening position and does not require that the manual force be continuously applied.</p> |
