SC silent chains (SCA, SCR, SC)
SC silent chains use specially-coated round pins and distinctive plates to accomplish a perfect engagement mechanism, and might preserve a noise level remarkably decrease than typical roller chains.
SC kind silent chains is often made use of for high speed and substantial stress transmission much like a toothed metallic belt since the plates directly engage with the sprockets for driving.
SCR-04 silent chains are created with inner engaging framework for additional diminished noise level.
PS silent 
chain
A PS form silent chain has a framework through which a set of specially formed connecting pins and locker pins get hold of each other though rotating at every versatile bearing position. Therefore, it generates less heat specifically in substantial speed operation and is superb in durability. On top of that, the specially formed pins considerably minimize shock when the chain is engaged with sprockets, providing a higher silencing impact than SC silent chains.
Sprockets
Sprockets for silent chains adopt specific modules in involute tooth types for the SCA 04××, SC 25××, SC 06×× over the former webpage and PS silent chains to ensure silent substantial velocity operation. For all sizes, the sprocket tooth heads are usually hardened by induction hardening or carburizing.
