ANSI/ABMA 21.1-1988 (S2020)

Thrust Needle Roller and Cage Assemblies and Thrust Washers - Metric Design

This standard for metric thrust needle roller and cage assemblies and thrust washers includes:  Identification Code Symbols and Nomenclature Boundary Dimensions Tolerances Mounting Practice  All thrust needle roller and cage assemblies and thrust washers listed in this standard are not necessarily available. For availability consult bearing manufacturers. Other applicable standards should be consulted for tolerance definitions, gaging practices and methods of evaluating load ratings.  This standard only covers external dimensions. Functional interchangeability between makers of standard thrust needle roller and cage assemblies and thrust washers of the same size may depend on features which are not standardized. Hence the substitution of one make of a standard bearing for another should only be made after careful comparison of their characteristics and consideration of the requirements of the particular application.