  A ring may be regarded as a torus with r << R, where R is the major radius
and r is the minor radius. When such a ring is placed on a rough rod and
released with some angular velocity, it may continue to vertically spin around
the rod for some time instead of falling down immediately. It was observed that
two different kinds of motion for the rod exist, which are referred to as
single point and double point contact motion, based on the number of contact
points of the ring that are in contact with the rod. Single point contact
motion was observed for rings and double point contact motion was observed in
the case of a washer. We investigated the characteristics of the single point
contact motion. An explanation is provided for the single point contact motion
of the ring and an analysis of the forces on the ring is made. We observe a
hyperbolic decay in the angular velocity of the ring. An explicit solution is
determined for the single point contact motion of the ring and the obtained
solutions match the observed motion of the ring.
