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magnetizing

Discussion in 'Electrical Engineering' started by grod, Nov 12, 2003.

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  1. grod

    grod Guest

    I need to magnetize a screwdriver, can anyone tell me how?

    Thanks
     
  2. Beachcomber

    Beachcomber Guest

    Sure: It's very easy.

    Find a reasonably strong permanent magnet (the stronger the better).
    Rub the shaft of your screwdriver in the same direction at least 20 or
    more times. (In other words, if you are starting at the base of the
    shaft, place the magnet in close proximity and move it to the tip.
    Lift it off the tip and through the air, back to the base of the
    shaft. Repeat).

    This will work with most steel, and steel-alloy screwdrivers. Some
    screwdrivers are deliberately made of non-magnetic material, however,
    for sensitive electronic adjustments.

    Suitable permanent magnets are available from many sources. One
    company I have done business with is http://scientificsonline.com/

    Beachcomber
     
  3. Louis Bybee

    Louis Bybee Guest

    I built a Mag/Demag Device by assembling a core, about 1" in dia., of 16p
    nails with the heads, and points cut off. I constructed a form, and wound a
    coil around the nails. A double throw switch allowed the coil to be fed with
    AC, or DC via a bridge rectifier, and a momentary contact switch to operate.
    A fuse, and a case for safety completed the unit.

    Holding the ferrous metal implement very close to the core end, and
    operating the unit in the DC mode allowed for magnetization. Placing
    magnetized metal close to the core end, and turning on the coil in the AC
    mode while moving the magnetized metal slowly away while rotating the
    magnetized metal in a circular motion, a few feet away before turning off
    the coil, will do a good job of demagnetizing.

    Louis
     
  4. Zzzap

    Zzzap Guest


    There's a simple and cheap device you might find in a local
    hardware store or better yet an electrical outlet store. Just
    call and see if they have it in stock.

    Or you can order it online:

    http://www.tools-plus.com/hand-tools-screwdrivers.html
     
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