SC silent chains (SCA, SCR, SC)
SC silent chains use specially-coated round pins and unique plates to attain a perfect engagement mechanism, and can continue to keep a noise level remarkably reduced than typical roller chains.
SC style silent chains may be utilized for higher speed and massive stress transmission similar to a toothed metallic belt because the plates directly engage with the sprockets for driving.
SCR-04 silent chains are made with inner engaging structure 
for additional lowered noise degree.
PS silent chain
A PS type silent chain features a structure through which a set of specially formed connecting pins and locker pins get in touch with just about every other when rotating at every versatile bearing position. Thus, it generates less heat specially in high pace operation and is exceptional in sturdiness. On top of that, the specially formed pins tremendously cut down shock once the chain is engaged with sprockets, delivering a increased silencing effect than SC silent chains.
Sprockets
Sprockets for silent chains adopt particular modules in involute tooth varieties to the SCA 04××, SC 25××, SC 06×× to the prior page and PS silent chains to be sure silent substantial pace operation. For all sizes, the sprocket tooth heads usually are hardened by induction hardening or carburizing.
