I got samples and looked at one under a microscope -- it appears that the rotor can move about 0.005" in any direction before it touches the case. Using "don't touch" as a guideline, I end up with tolerances that drive my mechanical assembly costs through the roof. I can't imagine that's the intended way to use this -- it's for consumer products, so there's got to be a way to make it happen.
So, how do people make these things work as rotary position sensors? Is there a mechanical specifications document buried on the MuRata web site that I'm missing? Is there a cost-effective shaft coupler to be had that'll couple the angle without coupling off-axis motion?
Comments, advise, brickbats -- all are appreciated.