The chain is located at the external surface area of the wheel, equal a belt, and one’s teeth stick outside the chain. The chain grips with the wheel through teeth that are 
located in the bottom of the chain. The chain the teeth and the chain wheel tooth are so constituted that by wear at the linking elements the pitch improves, the chain accordingly tend to move out on the tooth surfaces, so to hold on a more substantial pitch diameter; the consequence of this move is usually that the pitch of the chain and the pitch of the wheel boost to the same level.
The load on the teeth is divided across all the teeth within the contact arc, whatever the extension by wear.
The links do not show any gliding on or of the teeth, which carries a soft and practically noiseless gripping; this transmission was also Special Chains china engineered for transmitting power or more speeds than this is allowed for roll chains.
The return of the “low noise chain” can amount 99% and for the full transfer from 96% to 97% under favourable conditions; of 94% upto 96% there exists a guarantee with smartly designed transmission under typical operating conditions.
The lifetime and maintenance of low noise chains depends mainly on the design of the complete chain drive, the tension arrangement included. At extremely loose chains the balancing of the chain will increase the wear. An excellent tension arrangement can double the lifetime. A slight clearance is required with at the least +/-3 mm. Although the chain is getting higher positioned on the teeth upon stretching of the pitch, this stretching is not moderated by the straight section of the chain, which means that this section can be slacking at wear.
