(6) The wheels of the going train have to be chamfered above an below and have a polished sink. In wheels 0.15 mm thick or less, a single chamfer is allowed on the bridge side.
所有輪系的齒輪傳動環邊及其支撐梁都必須削角，和小齒瓣結合處，必須打磨修飾。厚度相當或小於 0.15 mm 的齒輪，則可以只削角打磨一面，傳動環經過打磨。如果齒輪厚度大於 0.15 mm，則齒輪的兩面都必須做削角打磨處理。