通常自鑽床心子取下鑽头时,须待心子止转後,以鎯头及楔子将鑽头敲下,故使用时颇感不便,如图所示之自动拆卸装置卽可避免上述之缺点。此项装置係以扁铁一塊(A)置於心子横槽上端,以螺钉两枚連接於上圈(B),下端则受弹簧 Normally when the drill bit is removed from the heart of the drill press, the drill bit should be knocked down by the stirrup and the wedge after the check is stopped. Therefore, it is inconvenient to use it. The automatic disassembly device as shown in the figure can avoid the above disadvantages. This device is tied to a flat iron (A) placed in the heart of the transverse groove on the top, with two screws connected to the upper ring (B), the lower end of the spring