SC silent chains (SCA, SCR, SC)
SC silent chains use specially-coated round pins and exclusive plates to attain an excellent engagement mechanism, and might hold a noise level remarkably reduced than typical roller chains.
SC form silent chains can be used for higher velocity and huge tension transmission just like a toothed metallic belt since the 
plates immediately engage together with the sprockets for driving.
SCR-04 silent chains are created with inner engaging structure for additional diminished noise degree.
PS silent chain
A PS kind silent chain has a framework by which a set of specially formed connecting pins and locker pins get in touch with each and every other whilst rotating at just about every flexible bearing position. Thus, it generates less heat specially in substantial velocity operation and is great in sturdiness. Furthermore, the specially formed pins greatly reduce shock once the chain is engaged with sprockets, offering a increased silencing impact than SC silent chains.
Sprockets
Sprockets for silent chains adopt unique modules in involute tooth varieties for the SCA 04××, SC 25××, SC 06×× within the former page and PS silent chains to make sure silent high velocity operation. For all sizes, the sprocket tooth heads are often hardened by induction hardening or carburizing.