Flange or raceway guided plastic cage for bearing assembly

A roller bearing assembly comprising inner and outer annular races (Ri and Ro) having confronting raceways spaced apart to define an annular space for a plurality of rollers (R);

• a cage (12) having a pair of axially spaced circumferentially extending side rings (14 and 16);
• a plurality of webs (18) extending axially between said side rings and circumferentially spaced apart to define a plurality of pockets (P) for the rollers;
• the outer peripheral surface of said side rings adapted to be closely adjacent one of said races to guide said cage (12) radially;
• the webs (18) having side surfaces confronting the rollers including guide surfaces (26) extending inwardly a predetermined distance from the side rings providing only a small clearance between the guide surface (26) and the peripheral surface of the rollers;
• the confronting side surfaces (30 and 32) of the webs between the guide surfaces (26) being cut back to provide a gap of a greater clearance between the rollers and the web than at said guide surfaces (26);
• each of said webs (18) having projections (40) facing one another at the central portion of the web to embrace the rollers, the space between the adjacent projections (40) being less than the diameter of the roller to retain the rollers in the pocket;
• and
• means defining a plurality of circumferentially-spaced recesses aligned with the webs to promote circulation of lubricant.