COLLET ADJUSTING MECHANISM FOR DENTAL HANDPIECES

摘要

A straight handpiece having a rotatable outer sleeve which is capable of limited axial movement into a retracted position. Upon retraction, the sleeve becomes operatively coupled to a drawbar nut which is in turn connected to a collet drawbar projecting forwardly within the spindle of the handpiece. A collet is detachably secured to the front of the drawbar so that upon rotation of the sleeve the collet is retracted or extended to grip or release a dental bur.