Side bearing for a railroad car truck

A side bearing for use in a railroad car truck, comprising:

• a cage comprising a generally horizontal bottom surface and an upturned sidewall extending from the bottom surface to a top land, the upturned sidewall including an inwardly facing wear-limiting contour having at least one inwardly facing raised pad and defining an interior of the cage;
• a resilient element at least partially received within the interior of the cage;
• and
• a cap engaging an upper end of the resilient element, the cap including a generally horizontal top surface having a perimeter and a downturned sidewall disposed around the perimeter of the top surface and including an outwardly facing wear-limiting contour having at least one outwardly facing raised pad, the downturned sidewall of the cap being adapted to be at least partially received within the interior of the cage directly adjacent to the upturned sidewall of the cage.

A side bearing for use in a railroad car truck, comprising:

• a cage comprising a generally horizontal bottom surface and an upturned sidewall extending from the bottom surface to a top land, the upturned sidewall defining an interior of the cage;
• a resilient element at least partially received within the interior of the cage;
• and
• a cap engaging an upper end of the resilient element and comprising a generally horizontal top surface having a perimeter and a downturned sidewall which is substantially congruent with and directly adjacent to the upturned sidewall of the cage, wherein the upturned sidewall of the cage includes an inwardly facing wear-limiting contour which extends to the top land and the downturned sidewall of the cap includes an outwardly facing wear-limiting contour.

A side bearing for use in a railroad car truck, comprising:

• a cage comprising a generally horizontal bottom surface and an upturned sidewall extending from the bottom surface to a top land, the upturned sidewall defining an interior of the cage;
• a resilient element at least partially received within the interior of the cage;
• and
• a cap engaging an upper end of the resilient element and comprising a generally horizontal top surface having a perimeter and a downturned sidewall, wherein the upturned sidewall of the cage includes an inwardly facing wear-limiting contour, the downturned sidewall of the cap includes an outwardly facing wear-limiting contour, and each wear-limiting contour includes a plurality of equally spaced raised pads.

A side bearing for use in a railroad car truck, comprising:

• a cage comprising a generally horizontal bottom surface and an upturned sidewall extending a substantially uniform vertical height from the bottom surface to a top land, the upturned sidewall including an inwardly facing wear-limiting contour and defining an interior of the cage;
• a resilient element at least partially received within the interior of the cage;
• and
• a cap engaging an upper end of the resilient element, wherein
• the cap includes a generally horizontal top surface having a perimeter and a downturned sidewall including an outwardly facing wear-limiting contour, the downturned sidewall being disposed on the perimeter of the top surface and extending substantially vertically from the perimeter,
• the resilient element is movable from an uncompressed condition to a partially compressed condition to a further compressed condition, the downturned sidewall of the cap being adapted to be at least partially received within the interior of the cage directly adjacent to the upturned sidewall of the cage when the resilient element is in the further compressed condition,
• the wear-limiting contours are generally aligned with each other, and
• each wear-limiting contour includes a plurality of equally spaced raised pads and at least two of the raised pads associated with the wear-limiting contour of the upturned sidewall of the cage are generally aligned with at least two of the raised pads associated with the wear-limiting contour of the downturned sidewall of the cap.