I understand what you are saying. However getting the outer race off requires destroying it. Had a mechanic show me with a rag over it and a big hammer. I have a nifty scar on my knuckle from forty years ago to show for my efforts. The chisel thing, or the punch thing is the alternative. Also I shy away from having a novice use a torch on an axle. I can cut the race off and not damage the axle with one. However at about 400° you start taking the hardness out of the axle in a measurable way.