MACHINING TOOL HAVING ZERO-BACKLASH ULTRAFINE ADJUSTMENT

摘要

Machining tool comprising a main tool body, a slider element received at least partially in an opening in the main tool body and movable relative thereto in an adjustment direction between a first and second position, and a drive shaft having two threaded portions, wherein the first threaded portion of the drive shaft cooperates with the threaded portion of the slider element and the second threaded portion of the drive shaft cooperates with the threaded portion of the main body so that upon rotation of the drive shaft about its axis the slider element moves relative to the main body between the first and second positions. Ultrafine adjustment of the slider element is possible in almost zero-backlash fashion in relation to the main tool body in both adjustment directions by providing a spring element engaging the slider element and biased in the direction of one of the two positions.