The positive linkage between chain and gear wheel permits constant speeds despite having torque fluctuations and incredibly good reproducibility of speeds. Standard variable gear units force the transmission component through the use of excessive force – that is unnecessary and reduces the amount of efficiency.
Adjustable chain drives apply a lever mechanism, which applies just as much strain on the slat chain as required. This results 
in low operating temperature ranges, long life, high power density and an excellent PIV CHAIN CONVERTORS Variable Chain Drives efficiency – even in the partial load range.