The positive linkage among chain and gear wheel permits constant speeds despite having torque fluctuations and incredibly good reproducibility of speeds. Standard variable gear systems force the transmission element through the use of 
excessive force – this is unnecessary and reduces the PIV CHAIN CONVERTORS Variable Chain Drives amount of efficiency.
Adjustable chain drives apply a lever mechanism, which applies just as much pressure on the slat chain as required. This results in low operating temps, extended life, high power density and a great efficiency – also in the partial load range.