当要一个螺纹工件夹紧在车床的卡盘内加工时,通常的作法是:用一个剖成两半的标准螺母套住工件,再夹紧在卡盘上。这里推荐一种新办法,即用下图所示的夹套取代对开的标准螺母。其效果将会更好。因为,它比标准螺母长多了,既便于工件得到正确的位置,又使夹紧可靠。夹套的材质应视工件材质,或用钢或用有色金属均可。夹紧时应注意:卡盘的三个卡爪一定要位于夹套的三个没有开槽的面上。 When a threaded workpiece is to be clamped in a lathe chuck, it is common practice to nest the workpiece with a half-split standard nut and clamp it onto the chuck. Here is a recommended way to replace the standard nut with the jacket shown below. Its effect will be better. Because it is a lot longer than a standard nut, it gives the workpiece a good position and a reliable grip. Jacket material should be considered as the workpiece material, or steel or non-ferrous metals can be. Clamping should pay attention to: the three jaws chuck must be located in the jacket of the three non-grooved surface.