King pin question

[Denee007]

Hi all! I had nothing better to do than look at my front suspension, and don't know much about king pins! When I turn the spindle where the rotor or drum goes, like turning a wheel left to right, does the center of the king pin turn or is it stationary, or does it turn in the clamped bracket? As it is right now, when I move the spindle the center stays stationary and the outside parts goes with the spindle. This is difficult to explain~ am I explaining it well enough? There's no noticeble slack, but looks like it's never been greased, so when greased, the grease would come out the top?
dne'