当你车制小孔内螺纹时,如果手头没有现成的小型螺纹车刀,不妨试一试用丝锥来车制小孔内螺纹,可以为你解除小型螺纹车刀难以磨制的困难。例如若要车制 M10×1.25的小孔内螺纹,其小径只有φ8.647_0~(+0.22),可以采用 M8×1.25的丝锥为螺纹车刀。用丝锥车内螺纹时,丝锥安装在车床方刀架上,底下用小 V 型铁为定位,上面用刀架螺钉压紧。安装 When you make a small hole in the car thread, if you do not have a ready-made small screwdriver, try a tap to make a small hole in the screw, you can lift the small screwdriver difficult to grind difficult. For example, to make M10 × 1.25 small hole internal thread, the diameter of only φ8.647_0 ~ (+0.22), M8 × 1.25 tap can be used as a thread turning tool. Taps with the thread, the tap mounted on the lathe side knife holder, the bottom with a small V-iron for positioning, with a screwdriver above the holder. installation