Device for concentric chucking of article e.g. cutting workpiece, has shafts that are provided as guide of chunk jaws, such that shafts are placed in mirror symmetry parallel to spindle axis, and above bottom portion of base portion

摘要

The device (10) has a base portion (11) that is provided with two opposite and parallelly extending end plates (13,14) to form an intermediate space (15) above a bottom portion (16). A spindle assembly (12) is provided with two portions (A1,A2) with right and left hand threads. Two chunk jaws (200,300) are provided with respective through holes corresponding to internal threads of left and right hand threads. Two shafts (17,18) are provided as a guide of jaws, such that the shafts are placed in mirror symmetry parallel to a spindle axis (SA), and above bottom portion.