Yes the button in the center of the PTO (Thrust button) turns even after the PTO has disengaged (if the motor is turning then so is the button).
Factory Wear buttons are not ceramic but a sort of fiber (I'm sure someone here knows exactly what kind of fiber, but I do not) I believe that the "aftermarket" buttons are bronze not brass. Someone on one of the other forums has been experimenting with bronze bolts as wear buttons, and if I'm not mistaken, he had had pretty good luck so far.
Often times the wear buttons wear out quickly because of misadjustment, this comes in several forms, off to one side, too high/low, too much tension, or misadjusted PTO, jus t to name a few. Start by eyeballing where the buttons meet, look for misalignment when the pto is in the "not running position there should be a little air gap between the two. Hope this helps head you in the right direction.
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