图示的两用扳手是由车床内外方形扳手改成的,它不仅能用于驱动卡盘卡爪,还可完成刀具的紧固工作。方孔扳手2在筒壁的对面制成两条长槽,手柄4能在其中滑动。其扳手的方孔尺寸按刀架上的紧定螺钉的方头确定。扳手1的方头尺寸按卡盘扳口尺寸来定(C620用方孔17×17,方头14×14)。压簧3的弹力勿须过大,以免工作中费力。使用时,如果用于卡盘上,双手握着手柄4,并按下扳手1插入卡盘扳口里进行旋拧;当取消轴向 The illustrated dual-purpose wrench is modified by a square wrench both inside and outside the lathe. It can be used not only to drive the chuck jaws but also to tighten the tool. Square hole wrench 2 in the cylinder wall opposite the two long grooves, the handle 4 can slide in it. The square hole size of the wrench is determined by the square head of the set screw on the tool holder. The square head size of the wrench 1 is determined by the size of the chuck jaw (square 17 × 17 for C620 and square 14 × 14). Compression spring 3 elastic do not have too much, so as to avoid the laborious work. In use, if used on the chuck, hold the handle 4 with both hands and press the wrench 1 to insert into the chuck.