Originally Posted by earlwb
I have had to use a metal cutting tool a couple of times to get the bearing off of something before. That happened when the inner race comes out and the bearing comes apart, leaving the outer race in place. Of course with a Dremel tool it can take a while and use up a number of the cutoff discs. When the bearing itself is pretty small I had to fabricate a puller tool to get it out.
I think the most interesting way to remove a ball bearing race that was stuck inside a really expensive aluminum part one time, was when the machine shop used nitric Acid to dissolve it. Before then I would not have thought that nitric acid wouldn't dissolve aluminum. But since seeing that I have used it a few times to remove broken off taps, bolts or screws too.
That is neat
New one to me
I have welded outer bearing races like you describe just the race stuck and hard to get out
You weld around where the bearing runs inside and when it cools the race falls out
You could do that on a model engine too
Tig would be best there
Not everyone has access to that
But it is really painless way
Just me sharing