在高精度大中模数的滚刀铲磨床和其它模数、径节螺纹磨床设计中,往往选用图示的英制丝杠副传动方案,以兼顾公、英制螺纹的加工。其中驱动轴1到拨盘2的降速比一般选用1:2、1:3、1:4等整数降速比,以提高大模数的加工能力。这种方法,当控制挂轮比相对误差小于二十万分之一时,可加 In the high-precision large and medium modulus hob knife grinder and other modulus, diameter thread grinder design, often use the diagram of the British screw transmission scheme to take into account the public and British thread processing. The drive shaft 1 to the dial 2 speed ratio generally choose 1: 2, 1: 3, 1: 4 integer speed ratio, in order to improve the processing capacity of large modulus. This method, when the control wheel relative error less than two hundred thousandth, can be added