You mean like this...
View attachment 1370105
That's really not pressed in. The rotor bearing in say an ETA 2824-2 is pressed in, so it can easily be pressed out, and a new bearing pressed in. The bearings in these are burnished in place, so the bearing is inserted and then a part of the rotor is burnished over to hold it in place. You can't just press one out and press another in.
Your best bet here is just to replace the entire rotor.
Click to expand...