SC silent chains (SCA, SCR, SC)
SC silent chains use specially-coated round pins and particular plates to accomplish an excellent engagement mechanism, and may continue to keep a noise level remarkably lower than conventional roller chains.
SC variety silent chains can be employed for high pace and massive stress transmission much like a toothed metallic belt because the plates immediately engage with all the sprockets for driving.
SCR-04 silent chains are built with inner engaging structure for more diminished noise degree.
PS silent chain
A PS 
form silent chain has a structure during which a set of specially formed connecting pins and locker pins speak to each and every other when rotating at just about every flexible bearing place. Hence, it generates much less heat specially in large velocity operation and is superb in durability. Furthermore, the specially formed pins significantly decrease shock once the chain is engaged with sprockets, delivering a larger silencing impact than SC silent chains.
Sprockets
Sprockets for silent chains adopt distinctive modules in involute tooth types for the SCA 04××, SC 25××, SC 06×× over the earlier web page and PS silent chains to guarantee silent higher pace operation. For all sizes, the sprocket tooth heads tend to be hardened by induction hardening or carburizing.