How can you ID a Magnet? (EG: Alnico, Stontiumm, Neodymium etc..)

Discussion in 'Archived Threads 2001-2004' started by Brett DiMichele, Feb 4, 2003.

  1. Brett DiMichele

    Brett DiMichele Producer

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    Hey Gang,

    I bought a stack of magnets off a co worker/friend of mine
    he got them at an auto parts meet years ago. They are 1/2"
    Diameter by 1/8" Thick and have 5 pounds worth of pull each!
    I know Neodymium is ceramic and these feel like a ferrous
    Magnet so I guess that rules out Neo.. Could they be Alnico?

    I bought 12 of them and was going to use them to hold the
    grills on my DIY speakers in the future. But I am thinking
    hell if I use these I won't be ABLE to get the grills off!
    It takes all I got, just to pull them apart!

    (Hmm Could I make a Hoverboard?) [​IMG]
     
  2. Brett DiMichele

    Brett DiMichele Producer

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    PS please excuse the typo's in the topic header... I meant
    Strontium (if that is spelled correctly...)
     
  3. David-S

    David-S Second Unit

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    Keep in mind that with longer distance between the magnets, they'll have less pull, so if you have MDF between them, they'll be easier to pull apart...
     
  4. Jack Gilvey

    Jack Gilvey Producer

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    Alnico smells somewhat like broccoli or old concrete.
    Hope that helps.
     
  5. Brett DiMichele

    Brett DiMichele Producer

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    Jack,

    Hmmmm that's interesting.. May I ask how you came about
    this information? [​IMG]

    David, even with an inch between them it's hard to hold
    the little buggers apart! [​IMG]
     
  6. Jack Gilvey

    Jack Gilvey Producer

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  7. Bill Fagal

    Bill Fagal Stunt Coordinator

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    Sounds like Neodymium.

    If they are ground smooth with fine corners or are nickle or epoxy plated, they're probably Nd.

    Alnico is usually a raw casting with minimal surface grinding. At least that's my experience.
     

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