I have ten (10) rare earth magnets bought from a jeweler. They don't grab both poles of the stir bar. WTF? Did I make a bad choice in magnets? I thought all magnets had a N/S pole and would automatically grab both ends of the stir bar. I have made several other stir plates that worked perfectly with rare earth magnets from hard drives. These are straight rare earth magnets that jewelers use. Any experience and insight as to why these magnets only grab one side of my stir bar is appreciated.
Why would a magnet this strong only attach to one side/pole of the stir bar? I used a flat washer on the fan with 6V DC adapter. Also, I have 1/2" spacers in between the stir bar and magnet/fan. I am t a loss as to hy the rare earth magnet only grabs one side.