I had a similar problem with a pinion bearing on a 4 wheeler. I cut an angle like I described earlier, on both sides almost through. then I struck the race ,backed up by a piece of railroad track, with a hammer the inner race broke cleanly across the cut line. Remember safety glasses, and a face shield when working with anything that has the possibility to shatter, or fragment!
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"CHIPBUF"
As long as we are spilling our guts, another trick we used was for removing taper bearing cups from machine parts without having or being able to use pullers is to take the mig or stick welder and weld a bead around the face of the cup, let it cool, and you can remove it with your fingers or a very light pry.
High jacked from another thread.