A power roller for a toroidal continuously variable transmission includes:
an inner wheel, an outer wheel a power roller bearing for bearing the
inner wheel. The power roller bearing includes an inner wheel orbital face
formed on the inner wheel, an outer wheel orbital face formed on the outer
wheel, and a rolling element interposed between the inner wheel orbital
face and the outer wheel orbital face. The rolling element is shaped into
a frustum of a cone. A first contact is made between one of the following
while a second contact is made between the other of the following: the
rolling element and the inner wheel orbital face, and the rolling element
and the outer wheel orbital face. The first contact is a point and the
second contact is a line. Otherwise, the first contact is shorter in width
than the second contact.
