1.Planetary gear with teeth shaving supply for OEM 2.Material:20CrMoH,ect. 3.Core hardness: ... involute teeth M2.5 Z23 is made by hobbing and shaving, with excellent control on the deformation during heat treatment, the ... teeth:23Module:2.5Pressure angle:201.Planetary gear with teeth shaving supply for OEM2.Material:20MnCr5, 8620H, 20CrMoH, 18CrNiMo53.Core hardness ...