HSS involute spline hob 1.Withhigh processing efficiency and can get high accuracy spline shaft ,spline hobis used widely . 2.Involute Serration hobs with PA=30°/ 45 °can be ordered. 3.Accuracy :ClassA ,ClassB 4.Size : (mm) Module Outside Dia.Overall LengthHole Dia.0.54532220.75150351.25401.5501.7563633222.5371713.54808059090610010081121124010125125