If I may, I'll give you a tip about ensuring the studs are right in when you get that far...Get some washers or an oversize nut or two (¾" thread perhaps, maybe an old castellated nut from a front stub axle) and a normal ½" UNF nut, possibly a wheel nut but turned backwards so you have flat surface against flat surface between the nuts and or washers.Put the stud in place, tap it in most of the way, fit up packing washers or nuts, screw on the nut and begin tightening. The purpose of this is to put tension on the stud as you hammer the back so it is inspired to go fully home.You will find it beneficial when doing this to turn the bearing retaining flange so the flat is towards the side where you're swinging your hammer, or maybe a drift would help. Tighten the nut, give it a whack, tighten some more and so on until you're satisfied it's fully pushed in.Ray