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Originally Posted by guandi
instead of having the ceramic shaft held at each end (makes it move too much imho) have it held at the bottom in the convensional way, and then have it held *behind* the impellar, where it comes out of the motor housing, then on top of that have the impellar as usual, but with a "nose cone" on it, in the middle, about half the height of the impellar itself.
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What? You mean something like this? The impeller sits atop the ceramic "ball". The impeller is held in place by magnetic force. The impeller is actually designed to "rock" slightly on the cermaic ball to allow for large particles to pass if they happen to get inside the pump, but basically it stays centered through magnetic force.
