includes a shoulder 66 at its inner edge and a series of four radially flexible fingers 68 at its outer edge a thin annular end ring 70 which has a radial width about a third of the diameter of a roller 58 is disposed parallel to plate 64 spaced therefrom by just slightly more than the length of a roller 58 as best seen in fig8 the radius of end ring 70 is such as to place it near the center of the radial space r as best seen in fig7 an evenly spaced circular array of windows 72 is molded axially through retention plate 64 equal in number to the rollers 58 the windows 72 are at the same radius as and exactly the same width as the end ring 70 and so open into the radial space r extending axially in from the backside of retention plate 64 to end ring 70 is an equal plurality of journal blocks 74 one at the interstice between each window 72 each journal block 74 is generally l shaped in cross section and has a thickness approximately equal to r the journal blocks 74 create a plurality of rectangular pockets along with end ring 70 and retention plate 64 one of which is clearly illustrated in fig8 referring next to fig5 and 7 more detail as to the design and purpose of cage unit 62 is illustrated while the shape of cage unit 62 is complex it is specifically designed so as to be easily integrally molded as can be clearly seen by comparing fig5 and 7 the end ring 70.