making pickups: magnet question

Discussion in 'Pickups & Electronics [BG]' started by wilser, Jun 16, 2005.

  1. Hello,
    I am planning on experimenting with my own pickups. I bought some rod alnico5 magnets from mcmaster-carr. They are about 4" long and are polarized N in one end and S in the other. I never considered that I have to cut them, but I don't know what'll happen to the polarity or how that would affect the pickup. If I cut, say 1/2" off the N side, will this piece of magnet still work for pickups?

  2. Tim__x


    Aug 13, 2002
    Alberta, Canada
    You'll have to careful, you musn't get it too hot when you cut it. Heat destroys magnets. Don't worry about the poles, instead of one big magnet think of it as billions of tiny magnets stuck together, as that is what it really is. When you cut it in half you'll be left with two magnets both with their own north and south poles.
  3. Thanks for the note about the heat and the explanation on polarities. I read that they recommend cutting alnico with an abraisive wheel, I have a dremel with abrasive wheels that I'll be using for that, now I know to go slow and keep it cool.