Abstract: A quick change jaw system for chucks is provided. The quick change jaw assembly includes a master jaw including a first pair of coplanar abutment surfaces defining a first aperture; a clamping device including a dovetail portion being disposed in the first aperture of the master jaw, wherein the dovetail portion rests above the first pair of coplanar top surfaces of master jaw; a top jaw formed with a groove longitudinally extending along a length of the top jaw, the groove being complementary to the dovetail portion and configured for engaging the dovetail portion, the top jaw including a second pair of coplanar abutment surfaces extending along opposite sides of the groove; and a cam for actuating the clamping device for urging the second pair of coplanar abutment surfaces of the top jaw into coengagement with the first pair of coplanar abutment surfaces of the master jaw.

Abstract: A quick change jaw system for chucks is provided. The quick change jaw assembly includes a master jaw including a first pair of coplanar abutment surfaces defining a first aperture; a clamping device including a dovetail portion being disposed in the first aperture of the master jaw, wherein the dovetail portion rests above the first pair of coplanar top surfaces of master jaw; a top jaw formed with a groove longitudinally extending along a length of the top jaw, the groove being complementary to the dovetail portion and configured for engaging the dovetail portion, the top jaw including a second pair of coplanar abutment surfaces extending along opposite sides of the groove; and a cam for actuating the clamping device for urging the second pair of coplanar abutment surfaces of the top jaw into coengagement with the first pair of coplanar abutment surfaces of the master jaw.

Abstract: A multi-jaw chuck having a centrifugally-actuated attachment for counterbalancing the adverse effect of centrifugal force on the chuck jaws during high speed operation. The chuck attachment includes an annular, hollow housing coaxially mounted on the chuck body and a lever associated with each of the jaws of the chuck which is pivotally mounted in the housing for pivotable movement about an axis parallel to the chuck body axis. Each of the levers includes a first pivot arm, disposed on one side of the pivot axis, for engagement with the jaw associated therewith and a second pivot arm, disposed on the other side of the pivot axis. The second arm has an effective length and weight such that it moves outwardly from the axis of the chuck body as a result of the centrifugal force developed upon rotation of the chuck body and, in turn, urges the first arm into engagement with the jaw associated therewith.