Try and get some heat in to it. Even blue threadlock can create a serious bond if it's slapped on liberally. If you round the bolt you are bit scuppered as one side of the brake becomes non-adjustable.
Try and get some heat in to it
Hairdryer? I don't have a soldering iron. I do have a cook's blowtorch...
I do have a cook's blowtorch...
If you have a good but sacrificial Allen key, stick that in, heat with blowtorch, then oven gloves.
@mashton started
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Try and get some heat in to it. Even blue threadlock can create a serious bond if it's slapped on liberally. If you round the bolt you are bit scuppered as one side of the brake becomes non-adjustable.