It is used to cut some type screws, such as the metric system screw, the modular system screw, and so on, when their transfer ratio of multiple structure equals one.
以C6 2 0 1型车床为例,对卧式车床摆移齿轮进给箱传动系统研究后,发现了一条新的传动路线,可以减少i倍 =1时,车削公制螺纹、模数螺纹、以及大导程螺纹传动链中传动齿轮 6个,使传动路线大大缩短,可较大地提高传动精度和被加工螺纹精度。