My assembly consists of 3 components.  Two cylindrical pieces screw together but do not shoulder up.  Each of these components have a "pocket" on their respective OD's that line up with each other.  The third component, the key, fits into this pocket, and is held in place by a bolt on one of the main pieces.  The goal of this simulation is to evaluate the stress in the key when a torque is applied to one of the cylindrical componets, while the other is fixed on the end.  My contact sets seem to work as inteded.  However, I'm having difficutly with the component with the torque applied to it.  I've placed a slider on the end to keep it in the plane, but I can't seem to keep the center axis of the component in place.