"SH" SERIES ROLLER CHAINS
ANSI “SH” series chains are identical to “H” series but they have a different pin material, which is through hardened. The surface hardness is less than that of the carburised pins in the ANSI standard and ANSI “H” series chains but through hardened pins provide additional fatigue resistance, at some slight sacrifice in wear life.
Simplex “SH” series chains operate on standard ANSI sprockets. Multiple strand “SH” series chain requires non-standard ANSI sprockets because of the thicker side plates.