I wouldn't say that I put stress on the shank while spinning them on. The shanks are knurled (slightly compressed) and I bore the holes 3 to 5 thousandths larger. Any repositioning is done while holding the shank with pliers so as not to stress the flange. I keep the burning-in to a minimum, any that need realignment usually get removed and reglued. I travel the shanks before installing hammers. -- Regards, Jon Page
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