Cup and Cone Retainers
National Cup And Cone Retainers are engineered for use in angular contact bearing applications. The strength of the retainer plus its ability to hold and separate balls is obtained by National's unique method of manufacture and assembly of the ball in the retainer. In manufacture, the metal is "wrapped around" the ball to provide maximum ball retention with minimum friction between ball and cage.
For years, the cup and cone retainer has been thought of as a "bicycle ball bearing." But imaginative and cost conscious engineers, realizing its possibilities, have developed a host of new applications for it. For instance, opposing cup and cone retainers provide an economical combination radial and thrust bearing. The one-piece assembly permits automated assembly with machined, stamped, or plastic molded parts.
Design Information
In addition to the "standard" items listed, National will design cup and cone retainers for any special application. The following diagram and formula suggest the best procedure for computing design.
- A. Minimum I.D. Cup
- B. Maxium diameter cone shoulder - I.D. Cup minus (1.7 x ball diam.)
- C. Recommended minimum clearance of .075" for retainer backbone
- D. Radious Cup and/or Cone = (.550 x ball diam.)
- E. Maximum O.D Shaft = I.D. Cup minus (2 x ball diam.)
