Perhaps 40 years ago I used a Loctite structural adhesive to fix a detached magnet problem on a DC motor of similar size doing much faster running and more demanding duties.
To my certain knowledge it lasted over five years before the offending object passed out of my ken.
As I recall it the windings on that one didn't look terribly healthy. I'm pretty sure that the person requesting the repair understood it was most likely a temporary measure that couldn't be expected to last all that long. As ever "Nowt so permanent as a temporary job."
So if totally stuck repair is possible.
Clive
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