Hi again,Icut it short the last time, The tool steel of the easy out will burn out easily,then try for the stud,trying to establsh a hole through the middle first, then to a side,don't freak if you go into the threads a little,it will still hold a bolt good enough to give the clamping action you need. We're dealing with three different metals here,tool steel,mild steel,and cast iron,and the cast iron is water cooled,and also of far greater mass so it acts as a heatsink