Patent ID: 6270086
Filing Date: 2001-08-07
Classification: B23B,Y10T

Abstract:
A tool holder comprisinga body formed to include a collet chamber,a collet including a collet body and a threaded post, the collet body including a body-engaging surface arranged to engage the body and a tool-gripping surface arranged to define a tool-receiving chamber adapted to receive a machine tool therein, the collet being mounted for movement in the collet chamber along a central axis of the body between a tool-grip position to cause the tool-gripping surface to move radially inwardly toward the central axis to grip the machine tool in the tool-receiving chamber and a tool-release position to cause the tool-gripping surface to move radially outwardly away from the central axis to release the machine tool, the body also being formed to include a mover chamber arranged to communicate with the collet chamber, the collet body being formed to include a notch,a collet mover positioned to lie in the mover chamber and coupled to the threaded post of the collet to draw the collet axially inwardly along the central axis to the tool-grip position in response to rotation of the collet mover about an axis of rotation in the mover chamber and push the collet axially outwardly along the central axis to the tool-release position in response to rotation of the collet mover about the axis of rotation in the mover chamber and a retainer ring extending circumferentially around the collet and being coupled to the body so that the retainer ring is fixed against movement relative to the body, the retainer ring being configured to contact the collet mover to prohibit axially outward movement of the collet mover relative to the central axis when the collet mover draws the collet axially inwardly relative to the central axis to the tool-grip position, the retainer ring being configured to fit within the notch formed in the collet body.