附图所示是一只奇异的磨床卡盘,它可以同时装夹二个外圆公差不同的工件,一起进行内圆加工。因为这种卡盘的底很薄,并且开了六条交叉的长槽,把盘底分六块相同的扇形,因此它富有弹性。在每块扇形上面又各有一个夹头,实际上是一个带有螺帽的调整螺钉,用以支持工件。这六个夹头分成二组,三个高三个低,每个互成120°角 Shown in the figure is a bizarre grinding machine chuck, which can clamp two different tolerances cylindrical workpiece, together with the inner circle. Because the bottom of the chuck is very thin, and opened six long cross slot, the bottom plate of the same six sub-sector, so it is flexible. On top of each fan there is a collet, which is actually an adjusting screw with a nut to support the work piece. The six chucks are divided into two groups, three high and three low, each forming a 120 ° angle