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Old 04-06-2012, 04:37 PM
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Join Date: Jan 2007
Location: Seattle, WA
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Over heating can destroy them. Depends on the classification. This is one of those areas where better (more expensive?) motors may be better off than cheapies.

Neodymium Magnet Information


Rare Earth magnets have a high resistance to demagnetization, unlike most other types of magnets. They will not lose their magnetization around other magnets or if dropped. They will however, begin to lose strength if they are heated above their maximum operating temperature, which is 176F (80C) for standard N grades. They will completely lose their magnetization if heated above their Curie temperature, which is 590F (310C) for standard N grades. Some of our magnets are of high temperature material, which can withstand higher temperatures without losing strength.
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