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Thread: How Do Knives Get Magnetized?

  1. #1
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    mr drinky's Avatar
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    How Do Knives Get Magnetized?

    I have two knives that have become magnetized. One is a shi*ty Cutco I married into and it was stored on a magnetic knife rack, so I assumed that had something to do with it, but now one of my Rodrigue parers is magnetized (at least I first noticed it today). I don't store it on a mag rack. How does this happen?

    k.
    "There's only one thing I hate more than lying…skim milk, which is water that's lying about being milk." -- Ron Swanson

  2. #2
    Magnetization from magnetic blocks (Mag-Block) is pretty insignificant and should be unnoticeable to a naked eye, but if a knife was ground from a Damascus billet or thinned blank that was in turn surface-ground on a magnetic chuck (magnetic chuck holds a part when engaged), and the part was not de-magnetized afterwards, the magnetization would remain. I have experienced it once - you actually see the poles of the magnets appear on your knife while you are hand-finish it - the way slurry arranges itself. That would be one explanation.

    A tool shop in your area would have a de-magnetizer.

    M


    "All beauty that has no foundation in use, soon grows distasteful and needs continuous replacement with something new." The Shakers' saying.

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    Impact can cause. Take your cheap Costco and smack it with a hammer and see if it goes away.

    -AJ

  4. #4
    I second smacking the cutco with a hammer, but for different reasons.

  5. #5
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    Quote Originally Posted by johndoughy View Post
    I second smacking the cutco with a hammer, but for different reasons.
    Good one Eamon. LOL.

    k.
    "There's only one thing I hate more than lying…skim milk, which is water that's lying about being milk." -- Ron Swanson

  6. #6
    This is a crazy offer but if anyone ever sends a knife to me and wants it demagnetized please just ask because I've got one of the machines to do that sitting in a draw here and I'd be more than happy to take the 30 sec to hook it up.

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    What would be the main problem with magnetized knives? Apart from it makes re-handling a pain because the metal fileings are a pain to get off.

    Seems like it might make it a more effective tool. I can cut prime rib, and reach that bolt I dropped behind the refrigerator.

  8. #8
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    Quote Originally Posted by kalaeb View Post
    What would be the main problem with magnetized knives? Apart from it makes re-handling a pain because the metal fileings are a pain to get off.

    Seems like it might make it a more effective tool. I can cut prime rib, and reach that bolt I dropped behind the refrigerator.
    Depending on how your kitchen is set up, and how highly magnetized your blade is, I'm guessing it might be a safety risk for some.

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    If your knife is magnetized it will pull the iron out of your beef and reduce the nutritional value.
    Spike C
    "The Buddha resides as comfortably in the circuits of a digital computer or the gears of a cycle transmission as he does at the top of a mountain."
    Pirsig

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    Quote Originally Posted by Andrew H View Post
    Depending on how your kitchen is set up, and how highly magnetized your blade is, I'm guessing it might be a safety risk for some.
    Strangely enough, this is a little bit of a concern. The Rodrigue parer is balanced such that if I give it a little nudge with my finger, it will just rotate perfectly on axis a half dozen times or so. It has happened a few times that nearby metal has pulled, pushed or dragged the blade in a direction. It isn't that much of a concern, but I have thought about it. I basically don't want it to move and I accidentally knock it on the floor or something.

    k.
    "There's only one thing I hate more than lying…skim milk, which is water that's lying about being milk." -- Ron Swanson

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