This Standard covers fatigue testing, in axial tension, of power transmission roller chains in ASME B29.1M and ASME B29.3M, and nonstandard variants of those chains. The main topics are (a) Testing equipment, (b) Test chains, (c) Test loads, (d) Testing procedures, and (e) Analyzing fatigue test data. A Table of required number of data points is included. Supplementary information is included on (a) Survival method with abridged probit analysis, (b) Additional â??phantomâ?? data points, (c) Adjusting one step to minimum fatigue strength, and (d) Adjusting laboratory fatigue strength for applications.