I have managed to rescue 3 electrical tools when bearings failed. Probably teaching you lot how to suck eggs but this is how I get the bearing out, just in case it is useful for someone.
I use a large socket on the end that the bearing will come out so that it can fit inside the socket, I then get a slightly smaller socket at the other end, this is used to push the bearing out. I then line up and place in a vice and slowly push the bearing out by tightening the vice.
Diagram below:
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