Two-piece roller retainer cage for a roller thrust bearing

A roller thrust bearing, comprising:

• a first cage half including an annular portion defining a plurality of roller pockets, a first flange extending axially from an inner peripheral edge of the annular portion, and a second flange extending axially from an outer peripheral edge of the annular portion;
• a second cage half including an annular portion defining a plurality of roller pockets, a first flange extending axially from an inner peripheral edge of the annular portion, and a second flange extending axially from an outer peripheral edge of the annular portion;
• and
• a plurality of roller elements, each roller element being rotatably received in a corresponding roller pocket of both the first cage half and the second cage half,
• wherein the second flange of the first cage half is disposed radially-inwardly of the second flange of the second cage half, the first cage half is comprised of a through-hardened metal, and the second cage half is comprised of a case carburized metal.