Abstract: A pull-to-close collet chuck for use with lathes equipped with servo-type bar loaders. The chuck is configured to be coupled to a lathe drawtube and translates linear movement of the drawtube to a work-gripping action to a collet. The chuck generally includes a ramp body surrounding a first portion of the collet and integral means for fixing the ramp body within a central bore of the chuck. A piston surrounds the collet and has a bearing surface adjacent a ramp surface of the ramp body, and a wedge is located between the ramp surface of the ramp body and the bearing surface of the piston. The wedge has multiple bearing surfaces through which the work gripping action is transferred from the piston to the collet as a result of radial inward movement of the wedge.