far as interference fit is concerned, keep in mind that the bearing also expands when the saw is operating. Not at the same rate as the case, but it expands as the case heats as well and why it has to be a larger than the case bore in the first place. I stick with the dimensional listing in the Machinery's handbook myself and I can actually obtain the dimensions of the bore, both cold and hot. I own a Mitytoyo as well as a Starrett digital CMM (Coordinate measuring machine as we use them in machining operations a lot). Not something a layperson can afford or need for that matter. I also own an optical comparator if that is of any consequence. All 3 are quite expensive as in over 15 grand for the 3.