Patent ID: 6293740
Filing Date: 2001-09-25
Classification: B23G,Y10T

Abstract:
A threading tool for milling an internal thread within a cavity of a workpiece comprising:an elongated member including a threading portion,the elongated member also having an axis of rotation (F) about which the elongated member spins, the axis of rotation (F) also describing an orbital path within the cavity of the workpiece,the theading portion having milling threads disposed at least partially thereon, the threading portion having an axial opening extending inwardly to define a recess and a fully enclosed recess bottom,the tool milling internal threads upon a wall of the cavity during orbital movement of the milling threads around a protuberance extending from a floor of the cavity, the recess of the elongated member receiving the protuberance while avoiding contact therewith, thereby allowing the tool to mill the internal threads past the protuberance adjacent the floor of the cavity.