SC silent chains (SCA, SCR, SC)
SC silent chains use specially-coated round pins and special plates to achieve an excellent engagement mechanism, and may maintain a noise degree remarkably lower than traditional roller chains.
SC variety silent chains might be applied for substantial speed and massive stress transmission similar to a toothed metallic belt because the plates right engage using the sprockets for driving.
SCR-04 silent chains are intended with inner engaging structure for more diminished noise degree.
PS silent chain
A PS variety silent chain has a 
structure by which a set of specially formed connecting pins and locker pins get in touch with every other while rotating at just about every flexible bearing place. So, it generates significantly less heat particularly in higher pace operation and is great in sturdiness. On top of that, the specially formed pins drastically decrease shock when the chain is engaged with sprockets, delivering a higher silencing effect than SC silent chains.
Sprockets
Sprockets for silent chains adopt specific modules in involute tooth kinds for the SCA 04××, SC 25××, SC 06×× within the previous webpage and PS silent chains to make sure silent substantial velocity operation. For all sizes, the sprocket tooth heads are generally hardened by induction hardening or carburizing.
