一、苏联小模数圆柱齿轮现行国家标准ГОСТ9178—59。 这个标准对大家来说,是很熟悉的,至今我们有的工厂还在继续使用。它与机标J B305—62基本上是一致的。精度等级公差值的确定,均以7级精度等级为计算基础,相邻精度等级的公差值分别乘或除以公比(?)得到:高于(或低于)7级的运动精度和工作平稳性采用除以(或乘以) First, the Soviet small module cylinder gear current national standard ГОСТ9178-59. This standard is very familiar to everyone, so far we have some factories continue to use. It is basically the same with J B305-62. Accuracy level tolerance values ​​are determined based on the accuracy level of 7, the tolerance of adjacent accuracy level multiplied or divided by the common ratio (?) Are: higher than (or below) 7 of the movement accuracy And work-smoothing divided by (or multiplied by)