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  1. #2
    Easiest way is just to anneal the end of the screw. Heat up the end and wrap a damp cloth round slightly further back to stop most of the heat conducting down the screw.

    If you're careful you'll end up with maybe 10-20mm of the portion you're not machining no longer hard ... but if your ballnut doesn't go that far then it's nothing to worry about.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

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