The track roller geometry can be defined using several points. The contour starts at axial position zero on the outside of the bearing and is then defined in clockwise direction.
A radius can be defined in the third column. An arc from the last point to the new point will be generated. For a convex contour use a positive value, for a concave contour use a negative value. A clockwise arc has a positive radius, a counterclockwise arc a negative radius.
Either a full geometry is defined back to the start point or only half the geometry is defined for a symmetric outer ring. In the graphic for the symmetric track roller geometry the mirrored part is shown in grey.