A rotary machine may include an inner component and a first group of
cylindrical rollers disposed around the inner component. Each of the
cylindrical rollers may have end-faces. The rotary machine may further
include an outer component with a first cylindrical inner surface
disposed against the cylindrical rollers. Additionally, the rotary
machine may include a first bearing cage associated with the first group
of cylindrical rollers. At least a portion of the first bearing cage may
be disposed inside the first cylindrical inner surface, and the first
bearing cage and the first cylindrical inner surface may be associated
with one another in such a manner to maintain the first bearing cage
substantially concentric to the first cylindrical inner surface. The
rotary machine may also include a first axial stop configured to limit
axial movement between the outer component and one or more of the
cylindrical rollers. Additionally, the rotary machine may include a
second axial stop configured to limit axial movement between one or more
of the cylindrical rollers and a component of the rotary machine other
than the outer component.