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  • Both cups have shredded teeth at this point, so something destructive has to happen.

    I like the massive hammer approach in principle. I think there's a real risk of damaging the frame but perhaps if I use a drill to attack the cups first then I can remove some metal and it will take less force to knock the the spindle out. It is the idea to bash out most of the alu cup in the same process, leaving behind only slithers of shredded alu threads in the steel BB shell?

    I reckon my plan is to work through in this order of increasing severity:

    1) Drill NDS cup with two holes for an angle grinder pin spanner, try to extract

    2) Drill DS cup the same, DS side

    3) Drill many more holes in the DS cup and attempt to hammer spindle through from NDS

    4) Drill much of the NDS and knock from DS

    5) Caustic soda down the seat tube

    There is another question... Should I spend £8 on a can of "freeze release" so that I can get the BB shell down to -30°C for steps 1) and 2). I'm leaning towards "yes".

  • There is another question... Should I spend £8 on a can of "freeze release" so that I can get the BB shell down to -30°C for steps 1) and 2). I'm leaning towards "yes".

    Why do you want to contract the metal BB shell? Contracting the cups is more likely to help release.

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