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Yep! That's fcuked!! Right, axle out, bearing out. Get hold of a hacksaw and cut some slots into the inside of the cup - be sure not to cut so deep that you damage the BB shell though.Next, hammer and a good sturdy punch or drift of some sort and strike on the edge of the bb towards the centre of the shell. You should be able to collapse or break the ally bb and it'll either break loose and start turning again, or it'll come out in bits.If you do this carefully the steel BB shell won't be damaged at all - you will be able to clean up the threads and all will be well