AutoCAD Inventor :: How To Build Assembly With Conical Rollers Rolling On Cylindrical Support

I'm trying to build an assembly with conical rollers rolling on a cylindrical support.  Refer to the attached sketch.  I'd like to be able to constrain the conical faces of the roller to the cylindrical surface of the support.  It doesn't seem to be possible to do that in Inventor; or, more accurately, it's not possible to put a tangential constraint on both conical faces at the same time.  The first tangential constraint causes the part to place a generatrix line parallel to the axis of the cylinder.  (I had to look up what generatrix means, too.)  So it's not possible to make the second tangential constraint.

How I can do this?  Just in case that's not difficult enough, the reason I'm doing this is because, ultimately, the support will not be a plain cylinder but actually a tube that also curves.  It's the behaviour of the roller through various curves on the support tube that I ultimately want to model, but I have no hope of doing that if I can't even get the roller constrained onto a plain cylinder.