单刃铰刀在其刀体a的圆周上设有两根导向条b、c。工作时,如果使该导向条只是以其顶部在纵向上与工件壁e接触,则可减少导向条侧棱d上的磨损。因此,可以在导向条d、c上涂以硬质材料。这有利于用螺钉把开有槽g的导向条b、c拧紧在刀体a上。从而提高了单刃铰刀在工作时的润滑和冷却作用。 The single-edged reamer has two guide bars b, c on the circumference of the cutter body a. In operation, if the guide strip is brought into contact with the workpiece wall e only with its top in the longitudinal direction, the wear on the guide bead d can be reduced. Therefore, the guide strips d, c can be coated with a hard material. This is helpful for screwing the guide bar b, c with groove g to the cutter body a. Thereby improving the single-edged reamer lubrication and cooling at work.