在机械装配和零件加工的过程中,经常会碰到零件深处螺纹孔的加工,这样,就必须使用套筒绞手。这种套筒绞手方孔的加工,一般采用方形冲头热压成型,制造比较困难,套筒与丝锥同心度差,攻起螺纹来晃动较大,影响螺纹质量。现介绍一种套筒绞手(图1),制造时只需按丝锥柄直径的大 In the process of mechanical assembly and parts processing, often encounter the deep part of the threaded hole machining, so you must use the sleeve twist. This sleeve twist square hole processing, the general use of hot stamping square punch, manufacturing more difficult, poor concentricity sleeve and tap, attack the thread to shake larger, affecting the quality of the thread. Now introduce a sleeve twist hand (Figure 1), manufactured by simply tapping the tap diameter