The chain is located at the external surface of the wheel, equal a belt, and the teeth stick outside the chain. The chain grips with the wheel through tooth 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 components the pitch boosts, the chain accordingly tend to move out on the tooth areas, so to grip on a larger pitch diameter; the consequence of this move is usually that the pitch of the chain and the pitch of the wheel enhance to the same extent.
The load on the teeth is divided across all the teeth within the contact arc, regardless of the extension by wear.
The links usually do not display any gliding on or of one's teeth, which posesses soft and practically noiseless gripping; this Special Chains china transmitting was also manufactured for 
transmitting power or higher speeds than this was 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 is a guarantee with well designed transmission under typical operating conditions.
The life time and maintenance of low noise chains depends mainly on the design of the entire chain drive, the tension arrangement included. At very loose chains the balancing of the chain will increase the wear. A good tension arrangement can double the lifetime. A slight clearance is necessary with a minimum of +/-3 mm. Although the chain gets higher positioned on one's teeth upon stretching of the pitch, this stretching is not moderated by the straight portion of the chain, which means that this section is definitely slacking at wear.
