Casting,Stainless Steel,Auto Parts Gaomi Gongji Precise Metal Co., Ltd , http://www.preccastings.com When processing a workpiece, the machining center often encounters the task of finding the zero point of the workpiece. A fast calibrating zero tool has been designed for this purpose, and its assembly relationship is shown in the figure. The connecting shafts 2, 4 are connected by a spring 3, and the spring 3 is fixed by the plug cover 1 and the pin 5. In use, the connecting shaft 2 is clamped by a drill chuck or a collet chuck (slightly tightened), and the workpiece is approached at a constant rotational speed. when