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Message: <blockquote data-quote="jimrhit" data-source="post: 2644025" data-attributes="member: 573319">Magnet Choices are usually either Ceramic or Neodymium.Ceramic comes is a bunch of different grades, rated with a Y## to indicate the magnets quality.A "bigger" magnet can be two things .. taller .. and wider.  A taller magnet does little to add to the B-element of Bl, whereas a widening (diamter increase) add significantly.   Manget stacking is usually used for mechanical clearances when it is deemed cheaper than machining/forging steel rebate or bumps.Multiple magnet can be used to save money (when making an 11" magnet is difficult) or when it is more reliable (thin magnets are prone to cracking, so multiple pie pucks are used)</blockquote>

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