Quote:
Originally Posted by philso
Heating the backing plate with a soldering iron may also work. It will not get the magnet hot enough to damage it. I have put these magnets onto red hot steel as part of a heat treating process and they still work fine.
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You're right about that Curie temperature; I'm not sure what I was misremembering, but I was significantly off. It's Sm-Co that has the higher Curie temperature, and Nd-Fe-B that has a lower one, but still over 300 °C. (See
here.)
Also, if the glue is cyanoacrylate, a good soak in acetone might help to loosen it enough to pry off easily.
Edit: I removed the erroneous portion of the comment in my post above, lest anyone get confused by it.