长治锻压机床厂使用的两种差动微调刀杆,用于高速精镗75公斤和400公斤空气锤连杆销孔,效果很好。图1所示的刀杆用于镗削75公斤空气锤连杆销孔。进刀螺丝4带有φ20×22扣/吋的英制外螺纹和M14×1的公制内螺纹,这样进刀螺丝每旋转一周刀头进给量为25.4/22-1=0.16(毫米),每转1格为0.01毫米。刀片为YT30,主偏角82°。切削用量可为:V=150～200米/分;S=0.02～0.07毫米/转; Changzhi forging machine tool factory to use two kinds of differential fine adjustment Arbor for high-speed fine boring 75 kg and 400 kg air hammer connecting rod pin hole, the effect is very good. The shank shown in Figure 1 is used for boring 75 kg air hammer link pin holes. Infeed screw 4 With an external male thread of φ20 x 22 buckle / inch and a male internal thread of M14 x 1, the feed of the tool bit per revolution of the infeed screw is 25.4 / 22-1 = 0.16 (mm) Turn 1 grid is 0.01 mm. YT30 blade, the main angle of 82 °. Cutting capacity can be: V = 150 ~ 200 m / min; S = 0.02 ~ 0.07 mm / rev;