SC 
silent chains (SCA, SCR, SC)
SC silent chains use specially-coated round pins and distinctive plates to realize a perfect engagement mechanism, and will maintain a noise level remarkably decrease than standard roller chains.
SC form silent chains might be utilised for high pace and significant stress transmission just like a toothed metallic belt since the plates straight engage together with the sprockets for driving.
SCR-04 silent chains are created with inner engaging structure for further decreased noise degree.
PS silent chain
A PS style silent chain features a structure by which a set of specially formed connecting pins and locker pins speak to every single other whilst rotating at every versatile bearing position. Hence, it generates much less heat specifically in substantial speed operation and is excellent in durability. Additionally, the specially formed pins considerably cut down shock when the chain is engaged with sprockets, delivering a larger silencing effect than SC silent chains.
Sprockets
Sprockets for silent chains adopt special modules in involute tooth forms for the SCA 04××, SC 25××, SC 06×× within the past web page and PS silent chains to make sure silent substantial speed operation. For all sizes, the sprocket tooth heads are generally hardened by induction hardening or carburizing.
