HSS parallel side spline hob

four typies of tooth profile of HSS parallel side spline hob Type 1-- applied to spline shaft centered according to major dia. Type 2-- applied to lugged spline shaft centered according to major dia. Type 3--applied to spline shaft centered according to major dia. and with bottom dia. grinding allowance . Type 4-- applied to lugged splined shaft centered according to minor dia. and with bottom dia.grinding allowance . Accuracy :class A ,B class A is used for finishing ,class B is used for hobs with a grinding allowance . Tooth profile of spline hob