My word, there's been quite a bit of chat since I last looked!
Tony makes a good point about the loss of radius. The good news is that there is a generous radius on the bearing and enough of it remains after machining for it to still fit in its housing. On the outboard face of the adjacent bearing there is not even a need for a radius.
As has been mentioned, they tap apart without too much effort, and I have it on good authority from a bearing supplier, that there is no danger of the surface being damaged if done in a sensible manner. Certainly, I have never had any evidence of brinelling and the bearings have since run for thousands of miles.
By the same token, if an angular contact bearing comes apart when removing a crankshaft, just make sure to collect all balls together so they can be associated with that bearing and, when all is apart, check the now fully exposed races and decide if they are fit for further service. Clean up, reassemble and make the usual checks in the vice (as described elsewhere) to see if they can be used again.
Let's face it new ones are now very expensive and old ones should not be tossed aside simply because they have come apart. If buying new, avoid Chinese ones.
Ron